javascript正则表达式贪婪模式与非贪婪模式

/** 
** author: site120 
** function : get script part from html document 
**/ 
var loadJs = function(str , delayTime) 
{ 
 var delayTime = delayTime || 100; 
 var regExp_scriptTag = new RegExp("＜\\s*script([^>]*)>([\\s\\S]*?)＜/\\s*script\\s*>" , "gi"); 
 var regExp_scriptAttrib_src = new RegExp("\\s*src?\\s*=\\s*(\"([^\"]+)\"|\'([^\']+)\'|\\s*([^\\s]+)\\s*)" , "gi"); 
 var arr_scriptTag = null; 
 var arr_scriptAttib = null; 
 var scriptData = ""; 
 var jsList = new Array(); 
 while ((arr_scriptTag=regExp_scriptTag.exec(str)) != null) 
 { 
 while ((arr_scriptAttib=regExp_scriptAttrib_src.exec(arr_scriptTag[1])) != null) 
 { 
 if (arr_scriptAttib[3]) 
 { 
 jsList.push(arr_scriptAttib[3]); 
 } 
 else if (arr_scriptAttib[2]) 
 { 
 jsList.push(arr_scriptAttib[2]); 
 } 
 else 
 { 
 jsList.push(arr_scriptAttib[1]); 
 } 
 } 
 scriptData += (arr_scriptTag[2]); 
 } 
 for (var i=0; i＜jsList.length; i++) 
 { 
 var script = document.createElement("script"); 
 script.src = jsList[i]; 
 document.body.appendChild(script); 
 } 
 if (scriptData.length > 0) 
 { 
 var fn = "_siteFunction_" + new Date().getTime() + "_" + parseInt(Math.random()*10000) + "_120"; 
 scriptData = " var " + fn + " = function(){ " + scriptData + " }; "+fn+"();" 
 window.eval(scriptData); 
 } 
} 

这是用Js来处理正则表达式，原理与Java一样，
功能是读取一段网页源代码，并将它里面所有的script标签，截取并加载运行。
这里面的[\s\S]*?利用非贪婪模式来匹配最近script标签之间的所有代码。包括换行