用JavaScript实现全局替换，解决$等特殊符号的难题

<script type="text/javascript"> 
String.prototype.replaceAll = stringReplaceAll; 

function stringReplaceAll(AFindText,ARepText){ 
 var raRegExp = new RegExp(AFindText.replace(/([\(\)\[\]\{\}\^\$\+\-\\?\.\"\'\|\/\\])/g,"\\$1"),"ig"); 
 return this.replace(raRegExp,ARepText); 
} 

var ssString=".lei.;.CnLei.;.lei."; 
alert(ssString.replaceAll("lei","ie")); 

ssString=".${MyName}.;.${MyName}.;.${MyName}."; 
alert(ssString.replaceAll("${MyName}","lei")); 

ssString=".{MyName}.;.{MyName}.;.{MyName}."; 
alert(ssString.replaceAll("{MyName}","lei")); 
</script> 

<script type="text/javascript"> 
String.prototype.replaceString = stringReplaceAll; 

function stringReplaceAll(AFindText,ARepText){ 
 var raRegExp = new RegExp(AFindText,"ig"); 
 return this.replace(raRegExp,ARepText); 
} 

var ssString=".lei.;.CnLei.;.lei."; 
alert(ssString.replaceString("lei","ie")); 

ssString=".${MyName}.;.${MyName}.;.${MyName}."; 
alert(ssString.replaceString("${MyName}","lei")); 

ssString=".{MyName}.;.{MyName}.;.{MyName}."; 
alert(ssString.replaceString("{MyName}","lei")); 
</script> 

<script type="text/javascript"> 
String.prototype.replaceString = function(s1,s2){ 
this.str=this; 
if(s1.length==0)return this.str; 
 var idx=this.str.indexOf(s1); 
 while(idx>=0){ 
 this.str=this.str.substring(0, idx)+s2+this.str.substr(idx+s1.length); 
 idx=this.str.indexOf(s1); 
 } 
 return this.str; 
} 
var ssString=".lei.;.CnLei.;.lei."; 
alert(ssString.replaceString("lei","ie")); 

ssString=".${MyName}.;.${MyName}.;.${MyName}."; 
alert(ssString.replaceString("${MyName}","lei")); 

ssString=".{MyName}.;.{MyName}.;.{MyName}."; 
alert(ssString.replaceString("{MyName}","lei")); 
</script>