javascript技巧大全
//过滤数字
<input type=text onkeypress="return event.keyCode>=48&&event.keyCode<=57||(this.value.indexOf('.')<0?event.keyCode==46:false)" onpaste="return !clipboardData.getData('text').match(/\D/)" ondragenter="return false">
//特殊用途
<input type=button value=导入收藏夹 onclick="window.external.ImportExportFavorites(true,'http://localhost');">
<input type=button value=导出收藏夹 onclick="window.external.ImportExportFavorites(false,'http://localhost');"> <input type=button value=整理收藏夹 onclick="window.external.ShowBrowserUI('OrganizeFavorites', null)"> <input type=button value=语言设置 onclick="window.external.ShowBrowserUI('LanguageDialog', null)"> <input type=button value=加入收藏夹 onclick="window.external.AddFavorite('http://www.google.com/', 'google')"> <input type=button value=加入到频道 onclick="window.external.addChannel('http://www.google.com/')"> <input type=button value=加入到频道 onclick="window.external.showBrowserUI('PrivacySettings',null)"> //不缓存
<META HTTP-EQUIV="pragma" CONTENT="no-cache">
<META HTTP-EQUIV="Cache-Control" CONTENT="no-cache, must-revalidate"> <META HTTP-EQUIV="expires" CONTENT="0"> //正则匹配
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*$)（像vbscript那样的trim函数） 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- ./?%&=]*)? 以下是例子： 利用正则表达式限制网页表单里的文本框输入内容： 用正则表达式限制只能输入中文：onkeyup= "value=value.replace(/[^\u4E00-\u9FA5]/g,'')" onbeforepaste= "clipboardData.setData('text',clipboardData.getData('text').replace(/[^\u4E00-\u9FA5]/g,''))" 1.用正则表达式限制只能输入全角字符： onkeyup= "value=value.replace(/[^\uFF00-\uFFFF]/g,'')" onbeforepaste= "clipboardData.setData('text',clipboardData.getData('text').replace(/[^\uFF00-\uFFFF]/g,''))" 2.用正则表达式限制只能输入数字：onkeyup= "value=value.replace(/[^\d]/g,'') "onbeforepaste= "clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))" 3.用正则表达式限制只能输入数字和英文：onkeyup= "value=value.replace(/[\W]/g,'') "onbeforepaste= "clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))" //消除图像工具栏
<IMG SRC="mypicture.jpg" HEIGHT="100px" WIDTH="100px" GALLERYIMG="false">
or <head> <meta http-equiv="imagetoolbar" content="no"> </head> //无提示关闭
function Close()
{ var ua=navigator.userAgent var ie=navigator.appName== "Microsoft Internet Explorer"? true:false if(ie) { var IEversion=parseFloat(ua.substring(ua.indexOf( "MSIE ")+5,ua.indexOf( ";",ua.indexOf( "MSIE ")))) if(IEversion< 5.5) { var str = '<object id=noTipClose classid= "clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11">' str += '<param name= "Command" value= "Close"></object>'; document.body.insertAdjacentHTML( "beforeEnd", str); document.all.noTipClose.Click(); } else { window.opener = null; window.close(); } } else { window.close() } } //取得控件得绝对位置(1)
<script language=
"javascript">
function getoffset(e) { var t=e.offsetTop; var l=e.offsetLeft; while(e=e.offsetParent) { t+=e.offsetTop; l+=e.offsetLeft; } var rec = new Array(1); rec[0] = t; rec[1] = l; return rec } </script> //获得控件的绝对位置(2)
oRect = obj.getBoundingClientRect();
oRect.left oRect. //最小化,最大化,关闭
<object id=min classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11">
//光标停在文字最后 <param name="Command" value="Minimize"></object> <object id=max classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11"> <param name="Command" value="Maximize"></object> <OBJECT id=close classid="clsid:adb880a6-d8ff-11cf-9377-00aa003b7a11"> <PARAM NAME="Command" value="Close"></OBJECT> <input type=button value=最小化 onclick=min.Click()> <input type=button value=最大化 onclick=max.Click()> <input type=button value=关闭 onclick=close.Click()>
<script language=
"javascript">
function cc() { var e = event.srcElement; var r =e.createTextRange(); r.moveStart('character',e.value.length); r.collapse( true); r.select(); } </script> <input type=text name=text1 value= "123" onfocus= "cc()"> //页面进入和退出的特效
进入页面<meta http-equiv=
"Page-Enter" content=
"revealTrans(duration=x, transition=y)">
推出页面<meta http-equiv= "Page-Exit" content= "revealTrans(duration=x, transition=y)"> 这个是页面被载入和调出时的一些特效。duration表示特效的持续时间，以秒为单位。transition表示使 用哪种特效，取值为1-23: 0 矩形缩小 1 矩形扩大 2 圆形缩小 3 圆形扩大 4 下到上刷新 5 上到下刷新 6 左到右刷新 7 右到左刷新 8 竖百叶窗 9 横百叶窗 10 错位横百叶窗 11 错位竖百叶窗 12 点扩散 13 左右到中间刷新 14 中间到左右刷新 15 中间到上下 16 上下到中间 17 右下到左上 18 右上到左下 19 左上到右下 20 左下到右上 21 横条 22 竖条 23 //网页是否被检索
<meta name="ROBOTS" content="属性值">
其中属性值有以下一些: 属性值为"all": 文件将被检索，且页上链接可被查询； 属性值为"none": 文件不被检索，而且不查询页上的链接； 属性值为"index": 文件将被检索； 属性值为"follow": 查询页上的链接； 属性值为"noindex": 文件不检索，但可被查询链接； 属性值为"nofollow":
<p style="page-break-after:always">page1</p>
<p style="page-break-after:always">page2</p>
<object id=
"factory" style=
"display:none" viewastext
classid= "clsid:1663ed61-23eb-11d2-b92f-008048fdd814" codebase= "http://www.meadroid.com/scriptx/ScriptX.cab#Version=5,60,0,360" ></object> <input type=button value=页面设置 onclick= "factory.printing.PageSetup()"> <input type=button value=打印预览 onclick= "factory.printing.Preview()"> <script language=javascript> function window.onload() { // -- advanced features factory.printing.SetMarginMeasure(2) // measure margins in inches factory.printing.SetPageRange( false, 1, 3) // need pages from 1 to 3 factory.printing.printer = "HP DeskJet 870C" factory.printing.copies = 2 factory.printing.collate = true factory.printing.paperSize = "A4" factory.printing.paperSource = "Manual feed" // -- basic features factory.printing.header = "居左显示&b居中显示&b居右显示页码，第&p页/共&P页" factory.printing.footer = "（自定义页脚）" factory.printing.portrait = false factory.printing.leftMargin = 0.75 factory.printing.topMargin = 1.5 factory.printing.rightMargin = 0.75 factory.printing.bottomMargin = 1.5 } function Print(frame) { factory.printing.Print( true, frame) // print with prompt } </script> <input type=button value= "打印本页" onclick= "factory.printing.Print(false)"> <input type=button value= "页面设置" onclick= "factory.printing.PageSetup()"> <input type=button value= "打印预览" onclick= "factory.printing.Preview()"><br> <a href= "http://www.meadroid.com/scriptx/docs/printdoc.htm?static" target=_blank>具体使用手册，更多信息，点这里</a> //自带的打印预览
WebBrowser.ExecWB(1,1) 打开
Web.ExecWB(2,1) 关闭现在所有的IE窗口，并打开一个新窗口 Web.ExecWB(4,1) 保存网页 Web.ExecWB(6,1) 打印 Web.ExecWB(7,1) 打印预览 Web.ExecWB(8,1) 打印页面设置 Web.ExecWB(10,1) 查看页面属性 Web.ExecWB(15,1) 好像是撤销，有待确认 Web.ExecWB(17,1) 全选 Web.ExecWB(22,1) 刷新 Web.ExecWB(45,1) 关闭窗体无提示 <style media=print> .Noprint{display:none;}<!--用本样式在打印时隐藏非打印项目--> .PageNext{page-break-after: always;}<!--控制分页--> </style> <object id= "WebBrowser" width=0 height=0 classid= "CLSID:8856F961-340A-11D0-A96B-00C04FD705A2"> </object> <center class= "Noprint" > <input type=button value=打印 onclick=document.all.WebBrowser.ExecWB(6,1)> <input type=button value=直接打印 onclick=document.all.WebBrowser.ExecWB(6,6)> <input type=button value=页面设置 onclick=document.all.WebBrowser.ExecWB(8,1)> </p> <p> <input type=button value=打印预览 onclick=document.all.WebBrowser.ExecWB(7,1)> </center> //去掉打印时的页眉页脚
<script language=
"JavaScript">
var HKEY_Root,HKEY_Path,HKEY_Key; HKEY_Root= "HKEY_CURRENT_USER"; HKEY_Path= "\\Software\\Microsoft\\Internet Explorer\\PageSetup\\"; //设置网页打印的页眉页脚为空 function PageSetup_Null() { try { var Wsh= new ActiveXObject( "WScript.Shell"); HKEY_Key= "header"; Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key, ""); HKEY_Key= "footer"; Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key, ""); } catch(e){} } //设置网页打印的页眉页脚为默认值 function PageSetup_Default() { try { var Wsh= new ActiveXObject( "WScript.Shell"); HKEY_Key= "header"; Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key, "&w&b页码,&p/&P"); HKEY_Key= "footer"; Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key, "&u&b&d"); } catch(e){} } </script> <input type= "button" value= "清空页码" onclick=PageSetup_Null()> <input type= "button" value= "恢复页码" onclick=PageSetup_Default()> //浏览器验证
function checkBrowser()
{ this.ver=navigator.appVersion this.dom=document.getElementById?1:0 this.ie6=( this.ver.indexOf( "MSIE 6")>-1 && this.dom)?1:0; this.ie5=( this.ver.indexOf( "MSIE 5")>-1 && this.dom)?1:0; this.ie4=(document.all && ! this.dom)?1:0; this.ns5=( this.dom && parseInt( this.ver) >= 5) ?1:0; this.ns4=(document.layers && ! this.dom)?1:0; this.mac=( this.ver.indexOf('Mac') > -1) ?1:0; this.ope=(navigator.userAgent.indexOf('Opera')>-1); this.ie=( this.ie6 || this.ie5 || this.ie4) this.ns=( this.ns4 || this.ns5) this.bw=( this.ie6 || this.ie5 || this.ie4 || this.ns5 || this.ns4 || this.mac || this.ope) this.nbw=(! this.bw) return this; } //计算内容宽和高
<SCRIPT language="javascript"> function test(obj) { var range = obj.createTextRange(); alert("内容区宽度: " + range.boundingWidth + "px\r\n内容区高度: " + range.boundingHeight + "px"); } </SCRIPT> <BODY> <Textarea id="txt" height="150">sdf</textarea><INPUT type="button" value="计算内容宽度" onClick="test(txt)"> </BODY> //无模式的提示框
function modelessAlert(Msg)
//屏蔽按键
{ window.showModelessDialog("javascript:alert(\""+escape(Msg)+"\");window.close();","","status:no;resizable:no;help:no;dialogHeight:height:30px;dialogHeight:40px;"); }
<html>
<head> <meta http-equiv= "Content-Type" content= "text/html; charset=gb2312"> <noscript><meta http-equiv= "refresh" content= "0;url=about:noscript"></noscript> <title>屏蔽鼠标右键、Ctrl+N、Shift+F10、Alt+F4、F11、F5刷新、退格键</title> </head> <body> <script language= "Javascript"><!-- //屏蔽鼠标右键、Ctrl+N、Shift+F10、F11、F5刷新、退格键 //Author: meizz(梅花雨) 2002-6-18 function document.oncontextmenu(){event.returnValue= false;} //屏蔽鼠标右键 function window.onhelp(){ return false} //屏蔽F1帮助 function document.onkeydown() { if ((window.event.altKey)&& ((window.event.keyCode==37)|| //屏蔽 Alt+ 方向键 ← (window.event.keyCode==39))) //屏蔽 Alt+ 方向键 → { alert( "不准你使用ALT+方向键前进或后退网页！"); event.returnValue= false; } /* 注：这还不是真正地屏蔽 Alt+ 方向键， 因为 Alt+ 方向键弹出警告框时，按住 Alt 键不放， 用鼠标点掉警告框，这种屏蔽方法就失效了。以后若 有哪位高手有真正屏蔽 Alt 键的方法，请告知。*/ if ((event.keyCode==8) || //屏蔽退格删除键 (event.keyCode==116)|| //屏蔽 F5 刷新键 (event.ctrlKey && event.keyCode==82)){ //Ctrl + R event.keyCode=0; event.returnValue= false; } if (event.keyCode==122){event.keyCode=0;event.returnValue= false;} //屏蔽F11 if (event.ctrlKey && event.keyCode==78) event.returnValue= false; //屏蔽 Ctrl+n if (event.shiftKey && event.keyCode==121)event.returnValue= false; //屏蔽 shift+F10 if (window.event.srcElement.tagName == "A" && window.event.shiftKey) window.event.returnValue = false; //屏蔽 shift 加鼠标左键新开一网页 if ((window.event.altKey)&&(window.event.keyCode==115)) //屏蔽Alt+F4 { window.showModelessDialog( "about:blank", "", "dialogWidth:1px;dialogheight:1px"); return false; } } </script> 屏蔽鼠标右键、Ctrl+N、Shift+F10、Alt+F4、F11、F5刷新、退格键 </body> </html> //屏蔽打印 //移动的图层，拖动
1.<span style='position:absolute;width:200;height:200;background:red' onmousedown=MouseDown(
this) onmousemove=MouseMove() onmouseup=MouseUp()>meizz</span>
<script language=javascript> var Obj; function MouseDown(obj) { Obj=obj; Obj.setCapture(); Obj.l=event.x-Obj.style.pixelLeft; Obj.t=event.y-Obj.style.pixelTop; } function MouseMove() { if(Obj!= null) { Obj.style.left = event.x-Obj.l; Obj.style.top = event.y-Obj.t; } } function MouseUp() { if(Obj!= null) { Obj.releaseCapture(); Obj= null; } } </script> 2. <div id= "myDiv" src= "logo.gif" ondrag= "doDrag();" onmouseover= "this.style.cursor='hand'" style= "position:absolute;left=100;top=100;" onmousedown= "doMouseDown();"> <a href= "#" onclick= "return false"><h1>wlecome</h1></a> </div> <script language= "JavaScript" type= "text/javascript"> var orgMouseX; var orgMouseY; var orgObjX; var orgObjY; function doDrag() { var myObject=document.all.myDiv; var x=event.clientX; var y=event.clientY; myObject.style.left=x-(orgMouseX-orgObjX); myObject.style.top=y-(orgMouseY-orgObjY); } function doMouseDown() { orgMouseX=event.clientX; orgMouseY=event.clientY; orgObjX=parseInt(document.all.myDiv.style.left); orgObjY=parseInt(document.all.myDiv.style.top); } </script> //文档状态改变
<iframe src=
"a.html" id=
"f" name=
"f" scrolling=
"no" frameborder=0 marginwidth=0 marginheight=0></iframe>
<script> var doc=window.frames[ "f"].document; function s(){ if (doc.readyState== "complete"){ document.all.f.style.height=doc.body.scrollHeight document.all.f.style.width=doc.body.scrollWidth } } doc.onreadystatechange=s </script> //刷新后不变的文本框
<HTML>
<HEAD> <META NAME="save" CONTENT="history"> <STYLE> .sHistory {behavior:url(#default#savehistory);} </STYLE> </HEAD> <BODY> <INPUT class=sHistory type=text id=oPersistInput> </BODY> </HTML> //访问剪贴板
(1)拖拽访问
event.dataTransfer.setData("URL", oImage.src); sImageURL = event.dataTransfer.getData("URL") (2)普通访问 window.clipboardData.setData("Text",oSource.innerText); window.clipboardData.getData("Text"); //操作COOKIE
function SetCookie(sName, sValue)
{ document.cookie = sName + "=" + escape(sValue) + "; "; } function GetCookie(sName) { var aCookie = document.cookie.split( "; "); for ( var i=0; i < aCookie.length; i++) { var aCrumb = aCookie[i].split( "="); if (sName == aCrumb[0]) return unescape(aCrumb[1]); } } function DelCookie(sName) { document.cookie = sName + "=" + escape(sValue) + "; expires=Fri, 31 Dec 1999 23:59:59 GMT;"; } //setTimeout增加参数
<script>
var _st = window.setTimeout; window.setTimeout = function(fRef, mDelay) { if(typeof fRef == ' function'){ var argu = Array.prototype.slice.call(arguments,2); var f = ( function(){ fRef.apply( null, argu); }); return _st(f, mDelay); } return _st(fRef,mDelay); } function test(x){ alert(x); } window.setTimeout(test,1000,'fason'); </script>
Function.prototype.apply =
function (obj, argu) {
if (obj) obj.constructor.prototype._caller = this; var argus = new Array(); for ( var i=0;i<argu.length;i++) argus[i] = "argu[" + i + "]"; var r; eval( "r = " + (obj ? ( "obj._caller(" + argus.join( ",") + ");") : ( "this(" + argus.join( ",") + ");"))); return r; }; Function.prototype.call = function (obj) { var argu = new Array(); for ( var i=1;i<arguments.length;i++) argu[i-1] = arguments[i]; return this.apply(obj, argu); };
function DownURL(strRemoteURL,strLocalURL)
{ try { var xmlHTTP= new ActiveXObject( "Microsoft.XMLHTTP"); xmlHTTP.open( "Get",strRemoteURL, false); xmlHTTP.send(); var adodbStream= new ActiveXObject( "ADODB.Stream"); adodbStream.Type=1; //1=adTypeBinary adodbStream.Open(); adodbStream.write(xmlHTTP.responseBody); adodbStream.SaveToFile(strLocalURL,2); adodbStream.Close(); adodbStream= null; xmlHTTP= null; } catch(e) { window.confirm( "下载URL出错!"); } //window.confirm("下载完成."); }
function getXML(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); } } } //POST代替FORM
<SCRIPT language="VBScript"> Function URLEncoding(vstrIn) strReturn = "" For i = 1 To Len(vstrIn) ThisChr = Mid(vStrIn,i,1) If Abs(Asc(ThisChr)) < &HFF Then strReturn = strReturn & ThisChr Else innerCode = Asc(ThisChr) If innerCode < 0 Then innerCode = innerCode + &H10000 End If Hight8 = (innerCode And &HFF00)\ &HFF Low8 = innerCode And &HFF strReturn = strReturn & "%" & Hex(Hight8) & "%" & Hex(Low8) End If Next URLEncoding = strReturn End Function Function bytes2BSTR(vIn) strReturn = "" For i = 1 To LenB(vIn) ThisCharCode = AscB(MidB(vIn,i,1)) If ThisCharCode < &H80 Then strReturn = strReturn & Chr(ThisCharCode) Else NextCharCode = AscB(MidB(vIn,i+1,1)) strReturn = strReturn & Chr(CLng(ThisCharCode) * &H100 + CInt(NextCharCode)) i = i + 1 End If Next bytes2BSTR = strReturn End Function dim strA,oReq strA = URLEncoding("submit1=Submit&text1=中文") set oReq = CreateObject("MSXML2.XMLHTTP") oReq.open "POST","http://ServerName/VDir/TstResult.asp",false oReq.setRequestHeader "Content-Length",Len(strA) oReq.setRequestHeader "CONTENT-TYPE","application/x-www-form-urlencoded" oReq.send strA msgbox bytes2BSTR(oReq.responseBody) </SCRIPT> //readyState是xmlhttp返回数据的进度，0=载入中,1=未初始化,2=已载入,3=运行中,4=完成 //组件是否安装 //检查网页是否存在
function CheckURL(URL)
{ var xmlhttp = new ActiveXObject( "Microsoft.XMLHTTP"); xmlhttp.Open( "GET",URL, false); try { xmlhttp.Send(); var result = xmlhttp.status; } catch(e) { return( false); } if(result==200) { return true; } xmlhttp = null; return false; } //连接数据库
<script language=
"javascript">
//用 JavaScript 写服务器端连接数据库的代码示例 var conn = new ActiveXObject( "ADODB.Connection"); conn.Open( "Provider=SQLOLEDB.1; Data Source=localhost; User ID=sa; " + "Password=; Initial Catalog=pubs"); var rs = new ActiveXObject( "ADODB.Recordset"); var sql= "select * from authors"; rs.open(sql, conn); shtml = "<table width='100%' border=1>"; shtml += "<tr bgcolor='#f4f4f4'><td>au_id</td><td>au_lname</td><td>au_fname</td><td>phone</td><td>address</td><td> city</td><td>state</td><td>zip</td></tr>"; while(!rs.EOF) { shtml += "<tr><td>" + rs( "au_id") + "</td><td>" + rs( "au_lname") + "</td><td>" + rs( "au_fname") + "</td><td>" + rs( "phone") + "</td><td>" + rs( "address") + "</td><td>" + rs( "city") + "</td><td>" + rs( "state") + "</td><td>" + rs( "zip") + "</td></tr>"; rs.moveNext; } shtml += "</table>"; document.write(shtml); rs.close(); rs = null; conn.close(); conn = null; </script> //使用数据岛
<html> <body> srno：<input type=text datasrc=#xmldate DataFLD=srno size="76"><BR> times：<input type=text datasrc=#xmldate DataFLD=times size="76"><BR> <input id="first" TYPE=button value="<< 第一条记录" onclick="xmldate.recordset.moveFirst()"> <input id="prev" TYPE=button value="<上一条记录" onclick="xmldate.recordset.movePrevious()"> <input id="next" TYPE=button value="下一条记录>" onclick="xmldate.recordset.moveNext()"> <input id="last" TYPE=button value="最后一条记录>>" onclick="xmldate.recordset.moveLast()"> <input id="Add" TYPE=button value="添加新记录" onclick="xmldate.recordset.addNew()"> <XML ID="xmldate"> <infolist> <info ><srno>20041025-01</srno><times>null</times></info> <info ><srno>20041101-09</srno><times>2004年10月1日2点22分0秒</times></info> </infolist> </XML> </body> </html> //获得参数
<body> <a href="javascript:location.href=location.href + '?a=1&b=2'">search</a> <script language="JavaScript"> <!-- var a = location.search.substr(1); if(a.length>0) { var re = /([^&]*?)\=([^&]*)/g var s = a.match(re); for(var i= 0;i<s.length;i++) { alert(s[i]); alert(s[i].split("=")[1]); } } //--> </script> </body> //可编辑SELECT
<input type=text name=re_name style="width:100px;height:21px;font-size:10pt;"><span style="width:18px;border:0px solid red;"><select name="r00" style="margin-left:-100px;width:118px; background-color:#FFEEEE;" onChange="document.all.re_name.value=this.value;">
<option value="1">11111111<option> <option value="2">222222</option> <option value="3">333333</option> </select> </span> //设置光标位置 |