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var script = document.createElement('script');
script.type = 'text/javascript';
script.text = "alert('ÕâÊǶ¯Ì¬Ìí¼ÓµÄ!')";
document.body.appendChild(script);

<!doctype html>
<title>script.text by ˾ͽÕýÃÀ</title>
<meta charset="utf-8"/>
<meta name="keywords" content="script.text by ˾ͽÕýÃÀ" />
<meta name="description" content="script.text by ˾ͽÕýÃÀ" />
<script type="text/javascript">
window.onload = function(){
var script = document.createElement('script');
script.type = 'text/javascript';
script.text = "alert('ÕâÊǶ¯Ì¬Ìí¼ÓµÄ£¡')";
document.body.appendChild(script);
}
</s ......

JavaScript µ¹¼ÆÊ±Ìø×ª

 JavaScript ´úÂëÈçÏ£º
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 <script language="JavaScript1.2" type="text/javascript">
  function delayURL(url, time) {
   var delay= document.getElementById("time").innerHTML;
   if(delay>0){
    delay--;
    document.getElementById("time").innerHTML=delay;
   }else{
    window.top.location.href=url;
   }
     setTimeout("delayURL('" + url + "')", 1000);
 }
</script>
 <a href="index.jsp">ÕâÀï</a>
 <script type="text/javascript">
         delayURL("index.jsp",10000);
 </script>     ......

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 ½ñÌìÁ˽âÁËÒ»µãjavascriptµÄ»ù´¡£¬¼ÇÏÂÀ´¹©ºóÐøÑ§Ï°·­ÔÄ£º
Êý¾ÝÀàÐ͵ÄÅжϣºtypeof£¨var param£©   ÅжϱäµÃÊý¾ÝÀàÐÍ
ä¯ÀÀÆ÷ÒÔ¼°²Ù×÷ϵͳµÄÅбð±äÁ¿  navigator.userAgent navigator.platform
var sUserAgent = navigator.userAgent;
//¼ì²âOpera¡¢KHTML
var isOpera = sUserAgent.indexOf("Opera") > -1;
var isKHTML = sUserAgent.indexOf("KHTML") > -1 || sUserAgent.indexOf("Konqueror") > -1 || sUserAgent.indexOf("AppleWebKit") > -1;
//¼ì²âIE¡¢Mozilla
var isIE = sUserAgent.indexOf("compatible") > -1 && sUserAgent.indexOf("MSIE") > -1 && !isOpera;
var isMoz = sUserAgent.indexOf("Gecko") > -1 && !isKHTML;
//¼ì²â²Ù×÷ϵͳ
//navigator.platform
var isWin = (navigator.platform == "Win32") || (navigator.platform == "Windows");
var isMac = (navigator.platform == "Mac68K") || (navigator.platform == "MacPPC") || (navigator.platform == ......

javaScriptС¼¼Çɼ¯

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event.srcElement.tagName
event.srcElement.type
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event.srcElement.setCapture();  
event.srcElement.releaseCapture();  
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event.keyCode
event.shiftKey
event.altKey
event.ctrlKey
ʼþ·µ»ØÖµ
event.returnValue
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event.x
event.y
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document.activeElement
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document.captureEvents(Event.KEYDOWN);
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document.all("txt").focus();
document.all("txt").select();
´°ÌåÃüÁî
document.execCommand
´°ÌåCOOKIE
document.cookie
²Ëµ¥Ê¼þ
document.oncontextmenu
´´½¨ÔªËØ
document.createElement("SPAN");  
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document.elementfromPoint(event.x,event.y).tagName=="TD
document.elementfromPoint(event.x,event.y).appendChild(ms)  
´°ÌåͼƬ
document.images[Ë÷Òý]
´°Ìåʼþ°ó¶¨
document.onmousedown=scrollwindow;
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document.´°Ìå.elements[Ë÷Òý]
¶ÔÏó°ó¶¨Ê¼þ
document.all.xxx.detachEvent('onclick',a);
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navigator.plug ......

javascriptÊ÷ÈÏʶ

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getElementByTagName()  ÒÔ¼° getElementById()  ¶ÔÓÚ·µ»ØµÄ¶ÔÏó¿ÉÒÔÈ¥tagName¡¢nodeValue¡¢classNameÊôÐÔ  getAttribute»ñÈ¡¶ÔÏóµÄij¸öÌØÊâÊôÐÔÐÅÏ¢  setAttributeÉèÖÃij¶ÔÏóµÄÊôÐÔÐÅÏ¢
ʹÓÃoLi.childNodes[0] »ñÈ¡×Ó½Úµã¶ÔÏóÐÅÏ¢  parentNode »ñÈ¡¸¸½ÚµãÐÅÏ¢ nextSiblingÏÂÒ»ÏÂÐֵܽڵã¶ÔÏó previousSiblingÉÏÒ»¸ö½Úµã¶ÔÏó
firstChild µÚÒ»¸ö×Ó½Úµã 
ʹÓÃcreateElement ´©¼þÒ»¸öhtml±êÇ©¶ÔÏó createTextNode´´½¨Ò»¸öÎı¾½Úµã appendChild Ìí¼ÓÎı¾½ÚµãÐÅÏ¢ removeChildÒÆ³ý½ÚµãÐÅÏ¢
replaceChildÌæ»»½ÚµãÐÅÏ¢ insertBeforeÔÚij½Úµã֮ǰ²åÈëÒ»¸öеĽڵãÐÅÏ¢
innerHTMLÊôÐÔÓû§»ñȡһ¸ö±êÇ©µ±ÖеÄËùÓбêÇ©htmlÐÅÏ¢
ÒÔÉϾÍÊÇÁгöÁËjavascript»ñÈ¡¡¢²åÈëhtml±ê¼ÇµÄÏà¹Øº¯Êý¡£ ......

[´ÓjQuery¿´JavaScript]

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/*!
* jQuery JavaScript Library v1.3.2
* http://jquery.com/
*
* Copyright (c) 2009 John Resig
* Dual licensed under the MIT and GPL licenses.
* http://docs.jquery.com/License
*
* Date: 2009-02-19 17:34:21 -0500 (Thu, 19 Feb 2009)
* Revision: 6246
*/
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// ·Ç±àÂëÄÚ×Ö·û±ØÐë²»ÄÜÓ°Ïì½áÊø·û
// ·²ÊdzöÏÖÎı¾½áÊø·û£¬Ò²¾ÍÊÇÎÒÃǵĻسµ»»ÐÐʱ£¬JS½âÊÍÆ÷¾Í»á½«Æäµ±×÷×¢ÊͽáÊø
// ΪÁ˼õÉÙ³åͻͨ³£ÔÙ“//”ºó»á¼ÓÒ»¸ö¿Õ¸ñ
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* ÓÉб¸Ü“/”ºÍÐǺœ*”˳Ðò×éºÏ³É¶àÐÐ×¢ÊÍµÄÆðʼ·û
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