原生JS代码100例

1、原生JavaScript实现字符串长度截取
    function cutstr(str, len) {
        var temp;
        var icount = 0;
        var patrn = /[^\x00-\xff]/;
        var strre = "";
        for (var i = 0; i < str.length; i++) {
            if (icount < len - 1) {
                temp = str.substr(i, 1);
                if (patrn.exec(temp) == null) {
                    icount = icount + 1
                } else {
                    icount = icount + 2
                }
                strre += temp
            } else {
                break
            }
        }
        return strre + "..."
    }
2、原生JavaScript获取域名主机
    function getHost(url) {
        var host = "null";
        if(typeof url == "undefined"|| null == url) {
            url = window.location.href;
        }
        var regex = /^\w+\:\/\/([^\/]*).*/;
        var match = url.match(regex);
        if(typeof match != "undefined" && null != match) {
            host = match[1];
        }
        return host;
    }
3、原生JavaScript清除空格
    String.prototype.trim = function() {
        var reExtraSpace = /^\s*(.*?)\s+$/;
        return this.replace(reExtraSpace, "$1")
    }
4、原生JavaScript替换全部
    String.prototype.replaceAll = function(s1, s2) {
        return this.replace(new RegExp(s1, "gm"), s2)
    }
5、原生JavaScript转义html标签
    function HtmlEncode(text) {
        return text.replace(/&/g, '&').replace(/\"/g, '"').replace(//g, '>')
    }
6、原生JavaScript还原html标签
    function HtmlDecode(text) {
        return text.replace(/&/g, '&').replace(/"/g, '\"').replace(//g, '>')
    }
7、原生JavaScript时间日期格式转换
    Date.prototype.Format = function(formatStr) {
        var str = formatStr;
        var Week = ['日', '一', '二', '三', '四', '五', '六'];
        str = str.replace(/yyyy|YYYY/, this.getFullYear());
        str = str.replace(/yy|YY/, (this.getYear() % 100) > 9 ? (this.getYear() % 100).toString() : '0' + (this.getYear() % 100));
        str = str.replace(/MM/, (this.getMonth() + 1) > 9 ? (this.getMonth() + 1).toString() : '0' + (this.getMonth() + 1));
        str = str.replace(/M/g, (this.getMonth() + 1));
        str = str.replace(/w|W/g, Week[this.getDay()]);
        str = str.replace(/dd|DD/, this.getDate() > 9 ? this.getDate().toString() : '0' + this.getDate());
        str = str.replace(/d|D/g, this.getDate());
        str = str.replace(/hh|HH/, this.getHours() > 9 ? this.getHours().toString() : '0' + this.getHours());
        str = str.replace(/h|H/g, this.getHours());
        str = str.replace(/mm/, this.getMinutes() > 9 ? this.getMinutes().toString() : '0' + this.getMinutes());
        str = str.replace(/m/g, this.getMinutes());
        str = str.replace(/ss|SS/, this.getSeconds() > 9 ? this.getSeconds().toString() : '0' + this.getSeconds());
        str = str.replace(/s|S/g, this.getSeconds());
        return str
    }
8、原生JavaScript判断是否为数字类型
    function isDigit(value) {
        var patrn = /^[0-9]*$/;
        if (patrn.exec(value) == null || value == "") {
            return false
        } else {
            return true
        }
    }
9、原生JavaScript设置cookie值
    function setCookie(name, value, Hours) {
        var d = new Date();
        var offset = 8;
        var utc = d.getTime() + (d.getTimezoneOffset() * 60000);
        var nd = utc + (3600000 * offset);
        var exp = new Date(nd);
        exp.setTime(exp.getTime() + Hours * 60 * 60 * 1000);
        document.cookie = name + "=" + escape(value) + ";path=/;expires=" + exp.toGMTString() + ";domain=360doc.com;"
    }
10、原生JavaScript获取cookie值
    function getCookie(name) {
        var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));
        if (arr != null) return unescape(arr[2]);
        return null
    }
11、原生JavaScript加入收藏夹
    function AddFavorite(sURL, sTitle) {
        try {
            window.external.addFavorite(sURL, sTitle)
        } catch(e) {
            try {
                window.sidebar.addPanel(sTitle, sURL, "")
            } catch(e) {
                alert("加入收藏失败，请使用Ctrl+D进行添加")
            }
        }
    }
12、原生JavaScript设为首页
    function setHomepage() {
        if (document.all) {
            document.body.style.behavior = 'url(#default#homepage)';
            document.body.setHomePage('http://www.jq-school.com')
        } else if (window.sidebar) {
            if (window.netscape) {
                try {
                    netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect")
                } catch(e) {
                    alert("该操作被浏览器拒绝，如果想启用该功能，请在地址栏内输入 about:config,然后将项 signed.applets.codebase_principal_support 值该为true")
                }
            }
            var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces.nsIPrefBranch);
            prefs.setCharPref('browser.startup.homepage', 'http://www.jq-school.com')
        }
    }
13、原生JavaScript判断IE6
    var ua = navigator.userAgent.toLowerCase();
    var isIE6 = ua.indexOf("msie 6") > -1;
    if (isIE6) {
        try {
            document.execCommand("BackgroundImageCache", false, true)
        } catch(e) {}
    }
14、原生JavaScript加载样式文件
    function LoadStyle(url) {
        try {
            document.createStyleSheet(url)
        } catch(e) {
            var cssLink = document.createElement('link');
            cssLink.rel = 'stylesheet';
            cssLink.type = 'text/css';
            cssLink.href = url;
            var head = document.getElementsByTagName('head')[0];
            head.appendChild(cssLink)
        }
    }
15、原生JavaScript返回脚本内容
    function evalscript(s) {
            if(s.indexOf(']*?>([^\x00]*?)<\/script>/ig;
            var arr = [];
            while(arr = p.exec(s)) {
                    var p1 = /]*?src=\"([^\>]*?)\"[^\>]*?(reload=\"1\")?(?:charset=\"([\w\-]+?)\")?><\/script>/i;
                    var arr1 = [];
                    arr1 = p1.exec(arr[0]);
                    if(arr1) {
                            appendscript(arr1[1], '', arr1[2], arr1[3]);
                    } else {
                            p1 = /([^\x00]+?)<\/script>/i;
                            arr1 = p1.exec(arr[0]);
                            appendscript('', arr1[2], arr1[1].indexOf('reload=') != -1);
                    }
            }
            return s;
    }
16、原生JavaScript清除脚本内容
    function stripscript(s) {
            return s.replace(/.*?<\/script>/ig, '');
    }
17、原生JavaScript动态加载脚本文件
    function appendscript(src, text, reload, charset) {
            var id = hash(src + text);
            if(!reload && in_array(id, evalscripts)) return;
            if(reload && $(id)) {
                    $(id).parentNode.removeChild($(id));
            }
           
            evalscripts.push(id);
            var scriptNode = document.createElement("script");
            scriptNode.type = "text/javascript";
            scriptNode.id = id;
            scriptNode.charset = charset ? charset : (BROWSER.firefox ? document.characterSet : document.charset);
            try {
                    if(src) {
                            scriptNode.src = src;
                            scriptNode. = false;
                            scriptNode.onload = function () {
                                    scriptNode. = true;
                                    JSLOADED[src] = 1;
                            };
                            scriptNode.onreadystatechange = function () {
                                    if((scriptNode.readyState == 'loaded' || scriptNode.readyState == 'complete') && !scriptNode. {
                                            scriptNode. = true;
                                            JSLOADED[src] = 1;
                                    }
                            };
                    } else if(text){
                            scriptNode.text = text;
                    }
                    document.getElementsByTagName('head')[0].appendChild(scriptNode);
            } catch(e) {}
    }
18、原生JavaScript返回按ID检索的元素对象
    function $(id) {
            return !id ? null : document.getElementById(id);
    }
19、原生JavaScript返回浏览器版本内容
    function browserVersion(types) {
            var other = 1;
            for(i in types) {
                    var v = types ? types : i;
                    if(USERAGENT.indexOf(v) != -1) {
                            var re = new RegExp(v + '(\\/|\\s)([\\d\\.]+)', 'ig');
                            var matches = re.exec(USERAGENT);
                            var ver = matches != null ? matches[2] : 0;
                            other = ver !== 0 && v != 'mozilla' ? 0 : other;
                    }else {
                            var ver = 0;
                    }
                    eval('BROWSER.' + i + '= ver');
            }
            BROWSER.other = other;
    }
20、原生JavaScript元素显示的通用方法
    function $(id) {
            return !id ? null : document.getElementById(id);
    }
    function display(id) {
            var obj = $(id);
            if(obj.style.visibility) {
                    obj.style.visibility = obj.style.visibility == 'visible' ? 'hidden' : 'visible';
            } else {
                    obj.style.display = obj.style.display == '' ? 'none' : '';
            }
    }
21、原生JavaScript中有insertBefore方法,可惜却没有insertAfter方法?用如下函数实现
    function insertAfter(newChild,refChild){
            var parElem=refChild.parentNode;
            if(parElem.lastChild==refChild){
                    refChild.appendChild(newChild);
            }else{
                    parElem.insertBefore(newChild,refChild.nextSibling);
            }
    }
22、原生JavaScript中兼容浏览器绑定元素事件
    function addEventSamp(obj,evt,fn){
            if (obj.addEventListener) {
                    obj.addEventListener(evt, fn, false);
            }else if(obj.attachEvent){
                    obj.attachEvent('on'+evt,fn);
            }
    }
23、原生JavaScript光标停在文字的后面，文本框获得焦点时调用
    function focusLast(){
            var e = event.srcElement;
            var r =e.createTextRange();
            r.moveStart('character',e.value.length);
            r.collapse(true);
            r.select();
    }
24、原生JavaScript检验URL链接是否有效
    function getUrlState(URL){
            var xmlhttp = new ActiveXObject("microsoft.xmlhttp");
            xmlhttp.Open("GET",URL, false);
            try{
                    xmlhttp.Send();
            }catch(e){
            }finally{
                    var result = xmlhttp.responseText;
                    if(result){
                            if(xmlhttp.Status==200){
                                    return(true);
                            }else{
                                    return(false);
                            }
                    }else{
                            return(false);
                    }
            }
    }
25、原生JavaScript格式化CSS样式代码
    function formatCss(s){//格式化代码
            s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1");
            s = s.replace(/;\s*;/g, ";"); //清除连续分号
            s = s.replace(/\,[\s\.\#\d]*{/g, "{");
            s = s.replace(/([^\s])\{([^\s])/g, "$1 {\n\t$2");
            s = s.replace(/([^\s])\}([^\n]*)/g, "$1\n}\n$2");
            s = s.replace(/([^\s]);([^\s\}])/g, "$1;\n\t$2");
            return s;
    }
26、原生JavaScript压缩CSS样式代码
    function yasuoCss (s) {//压缩代码
            s = s.replace(/\/\*(.|\n)*?\*\//g, ""); //删除注释
            s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1");
            s = s.replace(/\,[\s\.\#\d]*\{/g, "{"); //容错处理
            s = s.replace(/;\s*;/g, ";"); //清除连续分号
            s = s.match(/^\s*(\S+(\s+\S+)*)\s*$/); //去掉首尾空白
            return (s == null) ? "" : s[1];
    }
27、原生JavaScript获取当前路径
    var currentPageUrl = "";
    if (typeof this.href === "undefined") {
        currentPageUrl = document.location.toString().toLowerCase();
    }
    else {
        currentPageUrl = this.href.toString().toLowerCase();
    }
28、原生JavaScriptIP转成整型
    function _ip2int(ip){
        var num = 0;
        ip = ip.split(".");
        num = Number(ip[0]) * 256 * 256 * 256 + Number(ip[1]) * 256 * 256 + Number(ip[2]) * 256 + Number(ip[3]);
        num = num >>> 0;
        return num;
    }
29、原生JavaScript整型解析为IP地址
    function _int2iP(num){
        var str;
        var tt = new Array();
        tt[0] = (num >>> 24) >>> 0;
        tt[1] = ((num << 8) >>> 24) >>> 0;
        tt[2] = (num << 16) >>> 24;
        tt[3] = (num << 24) >>> 24;
        str = String(tt[0]) + "." + String(tt[1]) + "." + String(tt[2]) + "." + String(tt[3]);
        return str;
    }
30、原生JavaScript实现checkbox全选与全不选
    function checkAll() {
            var selectall = document.getElementById("selectall");
            var allbox = document.getElementsByName("allbox");
            if (selectall.checked) {
                    for (var i = 0; i < allbox.length; i++) {
                            allbox.checked = true;
                    }
            } else {
                    for (var i = 0; i < allbox.length; i++) {
                            allbox.checked = false;
                    }
            }
    }
31、原生] JavaScript判断是否移动设备
    function isMobile(){
            if (typeof this._isMobile === 'boolean'){
                    return this._isMobile;
            }
            var screenWidth = this.getScreenWidth();
            var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;
            var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === "new");
            if(!fixViewPortsExperiment){
                    if(!this.isAppleMobileDevice()){
                            screenWidth = screenWidth/window.devicePixelRatio;
                    }
            }
            var isMobileScreenSize = screenWidth < 600;
            var isMobileUserAgent = false;
            this._isMobile = isMobileScreenSize && this.isTouchScreen();
            return this._isMobile;
    }
32、原生JavaScript判断是否移动设备访问
    function isAppleMobileDevice(){
            return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase()));
    }
33、原生JavaScript判断是否苹果移动设备访问
    function isAppleMobileDevice(){
            return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase()));
    }
34、原生JavaScript判断是否安卓移动设备访问
    function isAndroidMobileDevice(){
            return (/android/i.test(navigator.userAgent.toLowerCase()));
    }
35、原生JavaScript判断是否Touch屏幕
    function isTouchScreen(){
            return (('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch);
    }
36、原生JavaScript判断是否在安卓上的谷歌浏览器
    function isNewChromeOnAndroid(){
            if(this.isAndroidMobileDevice()){
                    var userAgent = navigator.userAgent.toLowerCase();
                    if((/chrome/i.test(userAgent))){
                            var parts = userAgent.split('chrome/');
                            var fullVersionString = parts[1].split(" ")[0];
                            var versionString = fullVersionString.split('.')[0];
                            var version = parseInt(versionString);
                            if(version >= 27){
                                    return true;
                            }
                    }
            }
            return false;
    }
37、原生JavaScript判断是否打开视窗
    function isViewportOpen() {
            return !!document.getElementById('wixMobileViewport');
    }
38、原生JavaScript获取移动设备初始化大小
    function getInitZoom(){
            if(!this._initZoom){
                    var screenWidth = Math.min(screen.height, screen.width);
                    if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){
                            screenWidth = screenWidth/window.devicePixelRatio;
                    }
                    this._initZoom = screenWidth /document.body.offsetWidth;
            }
            return this._initZoom;
    }
39、原生JavaScript获取移动设备最大化大小
    function getZoom(){
            var screenWidth = (Math.abs(window.orientation) === 90) ? Math.max(screen.height, screen.width) : Math.min(screen.height, screen.width);
            if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){
                    screenWidth = screenWidth/window.devicePixelRatio;
            }
            var FixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;
            var FixViewPortsExperimentRunning = FixViewPortsExperiment && (FixViewPortsExperiment === "New" || FixViewPortsExperiment === "new");
            if(FixViewPortsExperimentRunning){
                    return screenWidth / window.innerWidth;
            }else{
                    return screenWidth / document.body.offsetWidth;
            }
    }
40、原生JavaScript获取移动设备屏幕宽度
    function getScreenWidth(){
            var smallerSide = Math.min(screen.width, screen.height);
            var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;
            var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === "new");
            if(fixViewPortsExperiment){
                    if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){
                            smallerSide = smallerSide/window.devicePixelRatio;
                    }
            }
            return smallerSide;
    }
41、原生 JavaScript完美判断是否为网址
    function IsURL(strUrl) {
        var regular = /^\b(((https?|ftp):\/\/)?[-a-z0-9]+(\.[-a-z0-9]+)*\.(?:com|edu|gov|int|mil|net|org|biz|info|name|museum|asia|coop|aero|[a-z][a-z]|((25[0-5])|(2[0-4]\d)|(1\d\d)|([1-9]\d)|\d))\b(\/[-a-z0-9_:\@&?=+,.!\/~%\$]*)?)$/i
        if (regular.test(strUrl)) {
            return true;
        }
        else {
            return false;
        }
    }
42、原生JavaScript根据样式名称检索元素对象
    function getElementsByClassName(name) {
        var tags = document.getElementsByTagName('*') || document.all;
        var els = [];
        for (var i = 0; i < tags.length; i++) {
            if (tags.className) {
                var cs = tags.className.split(' ');
                for (var j = 0; j < cs.length; j++) {
                    if (name == cs[j]) {
                        els.push(tags);
                        break
                    }
                }
            }
        }
        return els
    }
43、原生JavaScript判断是否以某个字符串开头
    String.prototype.startWith = function (s) {
        return this.indexOf(s) == 0
    }
44、原生JavaScript判断是否以某个字符串结束
    String.prototype.endWith = function (s) {
        var d = this.length - s.length;
        return (d >= 0 && this.lastIndexOf(s) == d)
    }
45、原生JavaScript返回IE浏览器的版本号
    function getIE(){
        if (window.ActiveXObject){
            var v = navigator.userAgent.match(/MSIE ([^;]+)/)[1];
            return parseFloat(v.substring(0, v.indexOf(".")))
        }
        return false
    }
46、原生JavaScript获取页面高度
    function getPageHeight(){
            var g = document, a = g.body, f = g.documentElement, d = g.compatMode == "BackCompat"
                            ? a
                            : g.documentElement;
            return Math.max(f.scrollHeight, a.scrollHeight, d.clientHeight);
    }
47、原生JavaScript获取页面scrollLeft
    function getPageScrollLeft(){
            var a = document;
            return a.documentElement.scrollLeft || a.body.scrollLeft;
    }
48、原生JavaScript获取页面可视宽度
    function getPageViewWidth(){
            var d = document, a = d.compatMode == "BackCompat"
                            ? d.body
                            : d.documentElement;
            return a.clientWidth;
    }
49、原生JavaScript获取页面宽度
    function getPageWidth(){
            var g = document, a = g.body, f = g.documentElement, d = g.compatMode == "BackCompat"
                            ? a
                            : g.documentElement;
            return Math.max(f.scrollWidth, a.scrollWidth, d.clientWidth);
    }
50、原生JavaScript获取页面scrollTop
    function getPageScrollTop(){
            var a = document;
            return a.documentElement.scrollTop || a.body.scrollTop;
    }
51、原生JavaScript获取页面可视高度
    function getPageViewHeight() {
            var d = document, a = d.compatMode == "BackCompat"
                            ? d.body
                            : d.documentElement;
            return a.clientHeight;
    }
52、原生JavaScript跨浏览器添加事件
    function addEvt(oTarget,sEvtType,fnHandle){
            if(!oTarget){return;}
            if(oTarget.addEventListener){
                    oTarget.addEventListener(sEvtType,fnHandle,false);
            }else if(oTarget.attachEvent){
                    oTarget.attachEvent("on" + sEvtType,fnHandle);
            }else{
                    oTarget["on" + sEvtType] = fnHandle;
            }
    }
53、原生JavaScript跨浏览器删除事件
    function delEvt(oTarget,sEvtType,fnHandle){
            if(!oTarget){return;}
            if(oTarget.addEventListener){
                    oTarget.addEventListener(sEvtType,fnHandle,false);
            }else if(oTarget.attachEvent){
                    oTarget.attachEvent("on" + sEvtType,fnHandle);
            }else{
                    oTarget["on" + sEvtType] = fnHandle;
            }
    }
54、原生JavaScript去掉url前缀
    function removeUrlPrefix(a){
      a=a.replace(/：/g,":").replace(/．/g,".").replace(/／/g,"/");
      while(trim(a).toLowerCase().indexOf("http://")==0){
        a=trim(a.replace(/http:\/\//i,""));
      }
      return a;
    }
55、原生JavaScript随机数时间戳
    function uniqueId(){
            var a=Math.random,b=parseInt;
            return Number(new Date()).toString()+b(10*a())+b(10*a())+b(10*a());
    }
56、原生JavaScript全角半角转换,iCase: 0全到半，1半到全，其他不转化
    function chgCase(sStr,iCase){
            if(typeof sStr != "string" || sStr.length <= 0 || !(iCase === 0 || iCase == 1)){
                    return sStr;
            }
            var i,oRs=[],iCode;
            if(iCase){/*半->全*/
                    for(i=0; i半*/
                    for(i=0; i 65280 && iCode < 65375){
                                    iCode -= 65248;                              
                            }
                            oRs.push(String.fromCharCode(iCode));
                    }              
            }              
            return oRs.join("");              
    }
57、原生JavaScript确认是否键盘有效输入值
    function checkKey(iKey){
            if(iKey == 32 || iKey == 229){return true;}/*空格和异常*/
            if(iKey>47 && iKey < 58){return true;}/*数字*/
            if(iKey>64 && iKey < 91){return true;}/*字母*/
            if(iKey>95 && iKey < 108){return true;}/*数字键盘1*/
            if(iKey>108 && iKey < 112){return true;}/*数字键盘2*/
            if(iKey>185 && iKey < 193){return true;}/*符号1*/
            if(iKey>218 && iKey < 223){return true;}/*符号2*/
            return false;
    }
58、原生JavaScript获取网页被卷去的位置
    function getScrollXY() {
        return document.body.scrollTop ? {
            x: document.body.scrollLeft,
            y: document.body.scrollTop
        }: {
            x: document.documentElement.scrollLeft,
            y: document.documentElement.scrollTop
        }
    }
59、原生JavaScript另一种正则日期格式化函数+调用方法
    Date.prototype.format = function(format){ //author: meizz
      var o = {
        "M+" : this.getMonth()+1, //month
        "d+" : this.getDate(),    //day
        "h+" : this.getHours(),   //hour
        "m+" : this.getMinutes(), //minute
        "s+" : this.getSeconds(), //second
        "q+" : Math.floor((this.getMonth()+3)/3),  //quarter
        "S" : this.getMilliseconds() //millisecond
      }
      if(/(y+)/.test(format)) format=format.replace(RegExp.$1,
        (this.getFullYear()+"").substr(4 - RegExp.$1.length));
      for(var k in o)if(new RegExp("("+ k +")").test(format))
        format = format.replace(RegExp.$1,
          RegExp.$1.length==1 ? o[k] :
            ("00"+ o[k]).substr((""+ o[k]).length));
      return format;
    }
    alert(new Date().format("yyyy-MM-dd hh:mm:ss"));
60、原生JavaScript时间个性化输出功能
    /*
    1、< 60s, 显示为“刚刚”
    2、>= 1min && < 60 min, 显示与当前时间差“XX分钟前”
    3、>= 60min && < 1day, 显示与当前时间差“今天 XX:XX”
    4、>= 1day && < 1year, 显示日期“XX月XX日 XX:XX”
    5、>= 1year, 显示具体日期“XXXX年XX月XX日 XX:XX”
    */
    function timeFormat(time){
      var date = new Date(time)
        , curDate = new Date()
        , year = date.getFullYear()
        , month = date.getMonth() + 1
        , day = date.getDate()
        , hour = date.getHours()
        , minute = date.getMinutes()
        , curYear = curDate.getFullYear()
        , curHour = curDate.getHours()
        , timeStr;
           
      if(year < curYear){
        timeStr = year +'年'+ month +'月'+ day +'日 '+ hour +':'+ minute;
      }else{
        var pastTime = curDate - date
          , pastH = pastTime/3600000;
           
        if(pastH > curHour){
          timeStr = month +'月'+ day +'日 '+ hour +':'+ minute;
        }else if(pastH >= 1){
          timeStr = '今天 ' + hour +':'+ minute +'分';
        }else{
          var pastM = curDate.getMinutes() - minute;
          if(pastM > 1){
            timeStr = pastM +'分钟前';
          }else{
            timeStr = '刚刚';
          }
        }
      }
      return timeStr;
    }
61、原生JavaScript解决offsetX兼容性问题
    // 针对火狐不支持offsetX/Y
    function getOffset(e){
      var target = e.target, // 当前触发的目标对象
          eventCoord,
          pageCoord,
          offsetCoord;
           
      // 计算当前触发元素到文档的距离
      pageCoord = getPageCoord(target);
           
      // 计算光标到文档的距离
      eventCoord = {
        X : window.pageXOffset + e.clientX,
        Y : window.pageYOffset + e.clientY
      };
           
      // 相减获取光标到第一个定位的父元素的坐标
      offsetCoord = {
        X : eventCoord.X - pageCoord.X,
        Y : eventCoord.Y - pageCoord.Y
      };
      return offsetCoord;
    }
           
    function getPageCoord(element){
      var coord = { X : 0, Y : 0 };
      // 计算从当前触发元素到根节点为止，
      // 各级 offsetParent 元素的 offsetLeft 或 offsetTop 值之和
      while (element){
        coord.X += element.offsetLeft;
        coord.Y += element.offsetTop;
        element = element.offsetParent;
      }
      return coord;
    }
62、原生JavaScript常用的正则表达式
    //正整数
    /^[0-9]*[1-9][0-9]*$/;
    //负整数
    /^-[0-9]*[1-9][0-9]*$/;
    //正浮点数
    /^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$/; 
    //负浮点数
    /^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$/;
    //浮点数
    /^(-?\d+)(\.\d+)?$/;
    //email地址
    /^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/;
    //url地址
    /^[a-zA-z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$/;
    //年/月/日（年-月-日、年.月.日）
    /^(19|20)\d\d[- /.](0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])$/;
    //匹配中文字符
    /[\u4e00-\u9fa5]/;
    //匹配帐号是否合法(字母开头，允许5-10字节，允许字母数字下划线)
    /^[a-zA-Z][a-zA-Z0-9_]{4,9}$/;
    //匹配空白行的正则表达式
    /\n\s*\r/;
    //匹配中国邮政编码
    /[1-9]\d{5}(?!\d)/;
    //匹配×××
    /\d{15}|\d{18}/;
    //匹配国内电话号码
    /(\d{3}-|\d{4}-)?(\d{8}|\d{7})?/;
    //匹配IP地址
    /((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)/;
    //匹配首尾空白字符的正则表达式
    /^\s*|\s*$/;
    //匹配HTML标记的正则表达式
    < (\S*?)[^>]*>.*?|< .*? />;
63、原生JavaScript实现返回顶部的通用方法
    function backTop(btnId) {
            var btn = document.getElementById(btnId);
            var d = document.documentElement;
            var b = document.body;
            window.onscroll = set;
            btn.style.display = "none";
            btn.onclick = function() {
                    btn.style.display = "none";
                    window.onscroll = null;
                    this.timer = setInterval(function() {
                            d.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1);
                            b.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1);
                            if ((d.scrollTop + b.scrollTop) == 0) clearInterval(btn.timer, window.onscroll = set);
                    },
                    10);
            };
            function set() {
                    btn.style.display = (d.scrollTop + b.scrollTop > 100) ? 'block': "none"
            }
    };
    backTop('goTop');
64、原生JavaScript获得URL中GET参数值
    // 用法：如果地址是 test.htm?t1=1&t2=2&t3=3, 那么能取得：GET["t1"], GET["t2"], GET["t3"]
    function get_get(){
      querystr = window.location.href.split("?")
      if(querystr[1]){
        GETs = querystr[1].split("&")
        GET =new Array()
        for(i=0;i -1;
               }
               if (o == 'isIE'){
                             t = b.indexOf('msie') > -1;
               }
               if (o == 'isFF'){
                             t = b.indexOf('firefox') > -1;
               }
           return t;
    }
69、原生JavaScript获取单选按钮的值
    function get_radio_value(field){
            if(field&&field.length){      
                    for(var i=0;i|\[|\]|\{|\}|『|』|※|○|●|◎|§|△|▲|☆|★|◇|◆|□|▼|㊣|﹋|⊕|⊙|〒|ㄅ|ㄆ|ㄇ|ㄈ|ㄉ|ㄊ|ㄋ|ㄌ|ㄍ|ㄎ|ㄏ|ㄐ|ㄑ|ㄒ|ㄓ|ㄔ|ㄕ|ㄖ|ㄗ|ㄘ|ㄙ|ㄚ|ㄛ|ㄜ|ㄝ|ㄞ|ㄟ|ㄢ|ㄣ|ㄤ|ㄥ|ㄦ|ㄧ|ㄨ|ㄩ|■|▄|▆|\*|@|#|\^|\\/;
            if (re.test( chars) == true) {
                    return false;
            }else{
                    return true;
            }      
    }
73、原生JavaScript判断字符串是否大于规定的长度
    function isValidLength(chars, len) {
            if (chars.length < len) {
                    return false;
            }
            return true;
    }
74、原生JavaScript判断字符串是为网址不区分大小写
    function isValidURL( chars ) {
            var re=/^([hH][tT]{2}[pP]:\/\/|[hH][tT]{2}[pP][sS]:\/\/)(\S+\.\S+)$/;
            if (!isNULL(chars)) {
                    chars = jsTrim(chars);
                    if (chars.match(re) == null)
                            return false;
                    else
                            return true;
            }
            return false;
    }
75、原生JavaScript判断字符串是否为小数
    function isValidDecimal( chars ) {
            var re=/^\d*\.?\d{1,2}$/;
            if (chars.match(re) == null)
                    return false;
            else
                    return true;
    }
76、原生JavaScript判断字符串是否为整数
    function isNumber( chars ) {
            var re=/^\d*$/;
            if (chars.match(re) == null)
                    return false;
            else
                    return true;
    }
77、原生JavaScript判断字符串是否为浮点数
    function isFloat( str ) {
            for(i=0;i"9")&& str.charAt(i) != '.'){
                            return false;
               }
            }
            return true;
    }
78、原生JavaScript判断字符是否为A-Za-z英文字母
    function isLetters( str ){
            var re=/^[A-Za-z]+$/;
            if (str.match(re) == null)
                    return false;
            else
                    return true;
    }
79、原生JavaScript判断字符串是否邮政编码
    function isValidPost( chars ) {
            var re=/^\d{6}$/;
            if (chars.match(re) == null)
                    return false;
            else
                    return true;
    }
80、原生JavaScript判断字符是否空NULL
    function isNULL( chars ) {
            if (chars == null)
                    return true;
            if (jsTrim(chars).length==0)
                    return true;
            return false;
    }
81、原生JavaScript用正则表达式提取页面代码中所有网址
    var aa = document.documentElement.outerHTML.match(/(url\(|src=|href=)[\"\']*([^\"\'\(\)\<\>\[\] ]+)[\"\'\)]*|(http:\/\/[\w\-\.]+[^\"\'\(\)\<\>\[\] ]+)/ig).join("\r\n").replace(/^(src=|href=|url\()[\"\']*|[\"\'\>\) ]*$/igm,"");
    alert(aa)
82、原生JavaScript用正则表达式清除相同的数组(低效率)
    Array.prototype.unique=function(){
            return this.reverse().join(",").match(/([^,]+)(?!.*\1)/ig).reverse();
    };
83、原生JavaScript用正则表达式清除相同的数组(高效率)
    String.prototype.unique=function(){
            var x=this.split(/[\r\n]+/);
            var y='';
            for(var i=0;i[\s\S]*?<\/script>|\s+on[a-zA-Z]{3,16}\s?=\s?"[\s\S]*?"|\s+on[a-zA-Z]{3,16}\s?=\s?'[\s\S]*?'|\s+on[a-zA-Z]{3,16}\s?=[^ >]+/ig,"");
    }
87、原生JavaScript动态执行JavaScript脚本
    function javascript(){
            try{
              eval(K1.value);
            }catch(e){
                    alert(e.message);
            }
    }
88、原生JavaScript动态执行VBScript脚本
    function vbscript(){
            try{
                    var script=document.getElementById("K1").value;
                    if(script.trim()=="")return;
                    window.execScript('On Error Resume Next \n'+script+'\n If Err.Number<>0 Then \n MsgBox "请输入正确的VBScript脚本!",48,"脚本错误!" \n End If',"vbscript")
            }catch(e){
                    alert(e.message);
            }
    }
89、原生JavaScript实现金额大写转换函数
    function transform(tranvalue) {
      try {
        var i = 1;
        var dw2 = new Array("", "万", "亿"); //大单位
        var dw1 = new Array("拾", "佰", "仟"); //小单位
        var dw = new Array("零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"); //整数部分用
        //以下是小写转换成大写显示在合计大写的文本框中   
        //分离整数与小数
        var source = splits(tranvalue);
        var num = source[0];
        var dig = source[1];
        //转换整数部分
        var k1 = 0; //计小单位
        var k2 = 0; //计大单位
        var sum = 0;
        var str = "";
        var len = source[0].length; //整数的长度
        for (i = 1; i <= len; i++) {
          var n = source[0].charAt(len - i); //取得某个位数上的数字
          var bn = 0;
          if (len - i - 1 >= 0) {
            bn = source[0].charAt(len - i - 1); //取得某个位数前一位上的数字
          }
          sum = sum + Number(n);
          if (sum != 0) {
            str = dw[Number(n)].concat(str); //取得该数字对应的大写数字，并插入到str字符串的前面
            if (n == '0') sum = 0;
          }
          if (len - i - 1 >= 0) { //在数字范围内
            if (k1 != 3) { //加小单位
              if (bn != 0) {
                str = dw1[k1].concat(str);
              }
              k1++;
            } else { //不加小单位，加大单位
              k1 = 0;
              var temp = str.charAt(0);
              if (temp == "万" || temp == "亿") //若大单位前没有数字则舍去大单位
              str = str.substr(1, str.length - 1);
              str = dw2[k2].concat(str);
              sum = 0;
            }
          }
          if (k1 == 3) //小单位到千则大单位进一
          {
            k2++;
          }
        }
        //转换小数部分
        var strdig = "";
        if (dig != "") {
          var n = dig.charAt(0);
          if (n != 0) {
            strdig += dw[Number(n)] + "角"; //加数字
          }
          var n = dig.charAt(1);
          if (n != 0) {
            strdig += dw[Number(n)] + "分"; //加数字
          }
        }
        str += "元" + strdig;
      } catch(e) {
        return "0元";
      }
      return str;
    }
    //拆分整数与小数
    function splits(tranvalue) {
      var value = new Array('', '');
      temp = tranvalue.split(".");
      for (var i = 0; i < temp.length; i++) {
        value = temp;
      }
      return value;
    }
90、原生JavaScript常用的正则表达式大收集
    匹配中文字符的正则表达式： [\u4e00-\u9fa5]
    匹配双字节字符（包括汉字在内）：[^\x00-\xff]
    匹配空行的正则表达式：\n[\s| ]*\r
    匹配 HTML 标记的正则表达式：<(.*)>.*<\/\1>|<(.*) \/>
    匹配首尾空格的正则表达式：(^\s*)|(\s*$)
    匹配 IP 地址的正则表达式：/(\d+)\.(\d+)\.(\d+)\.(\d+)/g
    匹配 Email 地址的正则表达式：\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
    匹配网址 URL 的正则表达式：http://(/[\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?
    sql 语句：^(select|drop|delete|create|update|insert).*[        DISCUZ_CODE_39        ]nbsp;
    非负整数：^\d+[        DISCUZ_CODE_39        ]nbsp;
    正整数：^[0-9]*[1-9][0-9]*[        DISCUZ_CODE_39        ]nbsp;
    非正整数：^((-\d+)|(0+))[        DISCUZ_CODE_39        ]nbsp;
    负整数：^-[0-9]*[1-9][0-9]*[        DISCUZ_CODE_39        ]nbsp;
    整数：^-?\d+[        DISCUZ_CODE_39        ]nbsp;
    非负浮点数：^\d+(\.\d+)?[        DISCUZ_CODE_39        ]nbsp;
    正浮点数：^((0-9)+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))[        DISCUZ_CODE_39        ]nbsp;
    非正浮点数：^((-\d+\.\d+)?)|(0+(\.0+)?))[        DISCUZ_CODE_39        ]nbsp;
    英文字符串：^[A-Za-z]+[        DISCUZ_CODE_39        ]nbsp;
    英文大写串：^[A-Z]+[        DISCUZ_CODE_39        ]nbsp;
    英文小写串：^[a-z]+[        DISCUZ_CODE_39        ]nbsp;
    英文字符数字串：^[A-Za-z0-9]+[        DISCUZ_CODE_39        ]nbsp;
    英数字加下划线串：^\w+[        DISCUZ_CODE_39        ]nbsp;
    E-mail地址：^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+[        DISCUZ_CODE_39        ]nbsp;
    URL：^[a-zA-Z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\s*)?$ 或：^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*[        DISCUZ_CODE_39        ]nbsp;
    邮政编码：^[1-9]\d{5}[        DISCUZ_CODE_39        ]nbsp;
    电话号码：^((\(\d{2,3}\))|(\d{3}\-))?(\(0\d{2,3}\)|0\d{2,3}-)?[1-9]\d{6,7}(\-\d{1,4})?[        DISCUZ_CODE_39        ]nbsp;
    手机号码：^((\(\d{2,3}\))|(\d{3}\-))?13\d{9}[        DISCUZ_CODE_39        ]nbsp;
    双字节字符（包括汉字在内）：^\x00-\xff
    匹配首尾空格：(^\s*)|(\s*$)
    匹配 HTML 标记：<(.*)>.*<\/\1>|<(.*) \/>
    匹配空行：\n[\s| ]*\r
    提取信息中的网络链接：(h|H)(r|R)(e|E)(f|F) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)?
    提取信息中的邮件地址：\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
    提取信息中的图片链接：(s|S)(r|R)(c|C) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)?
    提取信息中的 IP 地址：(\d+)\.(\d+)\.(\d+)\.(\d+)
    提取信息中的中国手机号码：(86)*0*13\d{9}
    提取信息中的中国固定电话号码：(\(\d{3,4}\)|\d{3,4}-|\s)?\d{8}
    提取信息中的中国电话号码（包括移动和固定电话）：(\(\d{3,4}\)|\d{3,4}-|\s)?\d{7,14}
    提取信息中的中国邮政编码：[1-9]{1}(\d+){5}
    提取信息中的浮点数（即小数）：(-?\d*)\.?\d+
    提取信息中的任何数字 ：(-?\d*)(\.\d+)?
    IP：(\d+)\.(\d+)\.(\d+)\.(\d+)
    电话区号：^0\d{2,3}$
    腾讯 QQ 号：^[1-9]*[1-9][0-9]*[        DISCUZ_CODE_39        ]nbsp;
    帐号（字母开头，允许 5-16 字节，允许字母数字下划线）：^[a-zA-Z][a-zA-Z0-9_]{4,15}[        DISCUZ_CODE_39        ]nbsp;
    中文、英文、数字及下划线：^[\u4e00-\u9fa5_a-zA-Z0-9]+$
91、原生JavaScript实现窗体改变事件resize的操作（兼容所以的浏览器）
    (function(){
            var fn = function(){
                    var w = document.documentElement ? document.documentElement.clientWidth : document.body.clientWidth
                            ,r = 1255
                            ,b = Element.extend(document.body)
                            ,classname = b.className;
                    if(w < r){
                            //当窗体的宽度小于1255的时候执行相应的操作
                    }else{
                            //当窗体的宽度大于1255的时候执行相应的操作
                    }
            }
            if(window.addEventListener){
                    window.addEventListener('resize', function(){ fn(); });
            }else if(window.attachEvent){
                    window.attachEvent('onresize', function(){ fn(); });
            }
            fn();
    })();
92、原生JavaScript用正则清除空格分左右
    function ltrim(s){ return s.replace( /^(\s*| *)/, ""); }
    function rtrim(s){ return s.replace( /(\s*| *)$/, ""); }
    function trim(s){ return ltrim(rtrim(s));}
93、原生JavaScript判断变量是否空值
    /**
    * 判断变量是否空值
    * undefined, null, '', false, 0, [], {} 均返回true，否则返回false
    */
    function empty(v){
        switch (typeof v){
            case 'undefined' : return true;
            case 'string'    : if(trim(v).length == 0) return true; break;
            case 'boolean'   : if(!v) return true; break;
            case 'number'    : if(0 === v) return true; break;
            case 'object'    :
                if(null === v) return true;
                if(undefined !== v.length && v.length==0) return true;
                for(var k in v){return false;} return true;
                break;
        }
        return false;
    }
94、原生JavaScript实现base64解码
    function base64_decode(data){
            var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
            var o1, o2, o3, h1, h2, h3, h4, bits, i = 0,ac = 0,dec = "",tmp_arr = [];
            if (!data) { return data; }
            data += '';
            do {
                    h1 = b64.indexOf(data.charAt(i++));
                    h2 = b64.indexOf(data.charAt(i++));
                    h3 = b64.indexOf(data.charAt(i++));
                    h4 = b64.indexOf(data.charAt(i++));
                    bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
                    o1 = bits >> 16 & 0xff;
                    o2 = bits >> 8 & 0xff;
                    o3 = bits & 0xff;
                    if (h3 == 64) {
                            tmp_arr[ac++] = String.fromCharCode(o1);
                    } else if (h4 == 64) {
                            tmp_arr[ac++] = String.fromCharCode(o1, o2);
                    } else {
                            tmp_arr[ac++] = String.fromCharCode(o1, o2, o3);
                    }
            } while (i < data.length);
            dec = tmp_arr.join('');
            dec = utf8_decode(dec);
            return dec;
    }
95、原生JavaScript实现utf8解码
    function utf8_decode(str_data){
            var tmp_arr = [],i = 0,ac = 0,c1 = 0,c2 = 0,c3 = 0;str_data += '';
            while (i < str_data.length) {
                    c1 = str_data.charCodeAt(i);
                    if (c1 < 128) {
                            tmp_arr[ac++] = String.fromCharCode(c1);
                            i++;
                    } else if (c1 > 191 && c1 < 224) {     
                            c2 = str_data.charCodeAt(i + 1);
                            tmp_arr[ac++] = String.fromCharCode(((c1 & 31) << 6) | (c2 & 63));
                            i += 2;
                    } else {
                            c2 = str_data.charCodeAt(i + 1);
                            c3 = str_data.charCodeAt(i + 2);
                            tmp_arr[ac++] = String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
                            i += 3;
                    }
            }
            return tmp_arr.join('');
    }
96、原生JavaScript获取窗体可见范围的宽与高
    function getViewSize(){
            var de=document.documentElement;
            var db=document.body;
            var viewW=de.clientWidth==0 ?  db.clientWidth : de.clientWidth;
            var viewH=de.clientHeight==0 ?  db.clientHeight : de.clientHeight;
            return Array(viewW ,viewH);
    }
96、原生JavaScript判断IE版本号（既简洁、又向后兼容！）
    var _IE = (function(){
        var v = 3, div = document.createElement('div'), all = div.getElementsByTagName('i');
        while (
            div.innerHTML = '',
            all[0]
        );
        return v > 4 ? v : false ;
    }());
97、原生JavaScript获取浏览器版本号
    function browserVersion(types) {
        var other = 1;
        for (i in types) {
            var v = types ? types : i;
            if (USERAGENT.indexOf(v) != -1) {
                var re = new RegExp(v + '(\\/|\\s|: )([\\d\\.]+)', 'ig');
                var matches = re.exec(USERAGENT);
                var ver = matches != null ? matches[2] : 0;
                other = ver !== 0 && v != 'mozilla' ? 0 : other;
            } else {
                var ver = 0;
            }
            eval('BROWSER.' + i + '= ver');
        }
        BROWSER.other = other;
    }
98、原生JavaScript判断鼠标是否移出事件
    function isMouseOut(e, handler) {
            if (e.type !== 'mouseout') {
                    return false;
            }
            var reltg = e.relatedTarget ? e.relatedTarget : e.type === 'mouseout' ? e.toElement : e.fromElement;
            while (reltg && reltg !== handler) {
                    reltg = reltg.parentNode;
            }
            return (reltg !== handler);
    }
99、原生JavaScript半角转换为全角函数
    function ToDBC(str){
      var result = '';
      for(var i=0; i < str.length; i++){
        code = str.charCodeAt(i);
        if(code >= 33 && code <= 126){
          result += String.fromCharCode(str.charCodeAt(i) + 65248);
        }else if (code == 32){
          result += String.fromCharCode(str.charCodeAt(i) + 12288 - 32);
        }else{
          result += str.charAt(i);
        }
      }
    return result;
    }
100、原生JavaScript全角转换为半角函数
    function ToCDB(str){
      var result = '';
      for(var i=0; i < str.length; i++){
        code = str.charCodeAt(i);
        if(code >= 65281 && code <= 65374){
          result += String.fromCharCode(str.charCodeAt(i) - 65248);
        }else if (code == 12288){
          result += String.fromCharCode(str.charCodeAt(i) - 12288 + 32);
        }else{
          result += str.charAt(i);
        }
      }
    return result;
    }