1、原生JavaScript实现字符串长度截取
复制代码代码如下:
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
复制代码代码如下:
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
复制代码代码如下:
String.prototype.trim = function() {
var reExtraSpace = /^\s*(.*?)\s+$/;
return this.replace(reExtraSpace, "$1")
}
4、原生JavaScript替换全部
复制代码代码如下:
String.prototype.replaceAll = function(s1, s2) {
return this.replace(new RegExp(s1, "gm"), s2)
}
5、原生JavaScript转义html标签
复制代码代码如下:
function HtmlEncode(text) {
return text.replace(/&/g, '&').replace(/\"/g, '"').replace(//g, '>')
}
6、原生JavaScript还原html标签
复制代码代码如下:
function HtmlDecode(text) {
return text.replace(/&/g, '&').replace(/"/g, '\"').replace(//g, '>')
}
7、原生JavaScript时间日期格式转换
复制代码代码如下:
Date.prototype.Format = function(formatStr) {
var str = formatStr;
var Week = ['日', '一', '二', '三', '四', '五', '六'];
str = str.replace(/yyyy|YYYY/, this.getFullYear());
str = str.replace(/yy|YY/, (this.getYear() % 100) > 9 ? (this.getYear() % 100).toString() : '0' + (this.getYear() % 100));
str = str.replace(/MM/, (this.getMonth() + 1) > 9 ? (this.getMonth() + 1).toString() : '0' + (this.getMonth() + 1));
str = str.replace(/M/g, (this.getMonth() + 1));
str = str.replace(/w|W/g, Week[this.getDay()]);
str = str.replace(/dd|DD/, this.getDate() > 9 ? this.getDate().toString() : '0' + this.getDate());
str = str.replace(/d|D/g, this.getDate());
str = str.replace(/hh|HH/, this.getHours() > 9 ? this.getHours().toString() : '0' + this.getHours());
str = str.replace(/h|H/g, this.getHours());
str = str.replace(/mm/, this.getMinutes() > 9 ? this.getMinutes().toString() : '0' + this.getMinutes());
str = str.replace(/m/g, this.getMinutes());
str = str.replace(/ss|SS/, this.getSeconds() > 9 ? this.getSeconds().toString() : '0' + this.getSeconds());
str = str.replace(/s|S/g, this.getSeconds());
return str
}
8、原生JavaScript判断是否为数字类型
复制代码代码如下:
function isDigit(value) {
var patrn = /^[0-9]*$/;
if (patrn.exec(value) == null || value == "") {
return false
} else {
return true
}
}
9、原生JavaScript设置cookie值
复制代码代码如下:
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
复制代码代码如下:
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
复制代码代码如下:
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
复制代码代码如下:
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
复制代码代码如下:
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
复制代码代码如下:
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
复制代码代码如下:
function evalscript(s) {
if(s.indexOf('