function File_Extension(strFile){
	//获取文件扩展名
	var StrSplit2=strFile.split(".");
	 
	if (StrSplit2.length>=1){
		FileExtension="."+StrSplit2[StrSplit2.length-1].toLowerCase();
		
	}else{
		FileExtension="";
	}

	return FileExtension
}

function $(id) {
	return document.getElementById(id);
}

//给Stirng 增加replaceAll函数
String.prototype.replaceAll = function(
 strTarget, // The substring you want to replace
 strSubString // The string you want to replace in.
 ){
 var strText = this;
 strText = strText.replace(new RegExp(strTarget,"gm"), strSubString);
 return strText;
}

String.prototype.CData=function(){
	var strText = this;
	strText=strText.replaceAll("&","&");
	strText=strText.replaceAll("<","&lt;");
	strText=strText.replaceAll(">","&gt;");

	return strText;
}
 
String.prototype.endWith=function(oString){
  var   reg=new   RegExp(oString+"$");  
  return   reg.test(this);  
}

function WinOpen(url,name,iWidth,iHeight){
	var url;                                 //转向网页的地址;
	var name;                           //网页名称，可为空;
	var iWidth;                          //弹出窗口的宽度;
	var iHeight;                        //弹出窗口的高度;
	var iTop = (window.screen.height-30-iHeight)/2;       //获得窗口的垂直位置;
	var iLeft = (window.screen.width-10-iWidth)/2;           //获得窗口的水平位置;
	window.open(url,name,'height='+iHeight+',innerHeight='+iHeight+',width='+iWidth+',innerWidth='+iWidth+',top='+iTop+',left='+iLeft+',scrollbars=yes,resizeable=auto');
}