一个很简单的问题，急求帮忙！javascript 中的alert执行不了！！！

var BaseSb=new StringBuilder(); StringBuilder 无效的Object

解决方案 »

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JS中有StringBuilder吗？得自己加吧！
var   StringBuilder   =   function(){
        this._buffer         =   [];
        this._arg1           =   " ";
        this._arg2           =   " ";
        if   (arguments.length   >   0)   this._arg1   =   String(arguments[0]);
        if   (arguments.length   >   1)   this._arg2   =   String(arguments[1]);
}
StringBuilder.prototype.Append   =   function(str){
        this._buffer[this._buffer.length]   =   String(str);
}
StringBuilder.prototype.toString   =   function(){
        return   (this._arg2?this._arg1: " ")   +   this._buffer.join(this._arg2   +   this._arg1)   +   this._arg2;
}
StringBuilder.prototype.clear   =   function(){
        this._buffer   =   [];
}
<body>
<span id="boxs"> </span> <br> <br> <br> <br>
<a href="javascript:RefreshList();"> RefreshList </a> <br> <br>

<script>
function StringBuilder() {
this.string = new Array();
}StringBuilder.prototype.Append = function(str) {
this.string.push(str);
};StringBuilder.prototype.toString = function() {
return this.string.join("");
};  var urlKey = 'occIDList=600&occParentIDList=600&myLocIDList=30000&myLocParentIDList=30000&companyTypeIDList=&isInterView=1&prj=quick&sj=1'; function RefreshList(){
//alert(urlKey);
//$("#dvAD").hide();
//alert(urlKey);
//document.getElementById("dvSummary").innerHTML=" <h5>正在加载，请稍候…… </h5>";
//document.getElementById("dvTitle").innerHTML=" <h5>正在加载，请稍候…… </h5>";
//purge(document.getElementById("dvSummary"));
//$("#chkAllTop")[0].checked=false;
//$("#chkAllBott")[0].checked=false; checkedIndex=",";
alert(urlKey);
var BaseSb=new StringBuilder();
BaseSb.Append((urlKey));
BaseSb.Append("&curPage=");
//BaseSb.Append(curPage);
BaseSb.Append("&pageSize=");
//BaseSb.Append(pageSize);
BaseSb.Append("&recordCount=");
//BaseSb.Append(recordCount);
BaseSb.Append("&orderField=");
//BaseSb.Append(orderField);
BaseSb.Append("&order=");
//BaseSb.Append(order);
alert(BaseSb);
var BaseStr=base64encode(BaseSb.toString());
var httpurl=new StringBuffer();
httpurl.Append("/GetSearchResult.awp?");
httpurl.Append("jtq=onlyrecord");
httpurl.Append("&urlKey=");
httpurl.Append(BaseStr); }
</script>
<script> </script>
</body>
那如果是这样呢？
alert(BaseStr);这一句为什么执行不了？
<body>
<span id="boxs"></span> <br><br><br><br>
<a href="javascript:RefreshList();"> RefreshList</a><br><br>

<script>
var urlKey = 'occIDList=600&occParentIDList=600&myLocIDList=30000&myLocParentIDList=30000&companyTypeIDList=&isInterView=1&prj=quick&sj=1';function StringBuilder() {
this.string = new Array();
} StringBuilder.prototype.Append = function(str) {
this.string.push(str);
}; StringBuilder.prototype.toString = function() {
return this.string.join("");
};  function RefreshList(){
//alert(urlKey);
//$("#dvAD").hide();
//alert(urlKey);
//document.getElementById("dvSummary").innerHTML="<h5>正在加载，请稍候……</h5>";
//document.getElementById("dvTitle").innerHTML="<h5>正在加载，请稍候……</h5>";
//purge(document.getElementById("dvSummary"));
//$("#chkAllTop")[0].checked=false;
//$("#chkAllBott")[0].checked=false;

checkedIndex=",";
//alert(urlKey);
var BaseSb=new StringBuilder();
BaseSb.Append((urlKey));
BaseSb.Append("&curPage=2");
//BaseSb.Append(curPage);
BaseSb.Append("&pageSize=20");
//BaseSb.Append(pageSize);
BaseSb.Append("&recordCount=2000");
//BaseSb.Append(recordCount);
BaseSb.Append("&orderField=");
//BaseSb.Append(orderField);
BaseSb.Append("&order=DESC");
//BaseSb.Append(order);
alert(BaseSb);
alert(BaseSb.toString());
var BaseStr=base64encode(BaseSb.toString());
alert(BaseStr);
var httpurl=new StringBuilder();
httpurl.Append("/GetSearchResult.awp?");
httpurl.Append("jtq=onlyrecord");
httpurl.Append("&urlKey=");
httpurl.Append(BaseStr);

}function base64encode(Str){
Str=escape(Str);
var output="";
var chr1,chr2,chr3="";
var enc1,enc2,enc3,enc4="";
var i=0;
do{
chr1=Str.charCodeAt(i++);
chr2=Str.charCodeAt(i++);
chr3=Str.charCodeAt(i++);
enc1=chr1>>2;
enc2=((chr1&3)<<4)|(chr2>>4);
enc3=((chr2&15)<<2)|(chr3>>6);
enc4=chr3&63;
if(isNaN(chr2)){
enc3=enc4=64;
}
else if(isNaN(chr3)){
enc4=64;
} output=output+keyStr.charAt(enc1)+keyStr.charAt(enc2)+keyStr.charAt(enc3)+keyStr.charAt(enc4); chr1=chr2=chr3="";
enc1=enc2=enc3=enc4="";
}
while(i<Str.length);
return output;
}
</script>
<script> </script>
自己得学会测试呀，
<body>
<span id="boxs"> </span> <br> <br> <br> <br>
<a href="javascript:RefreshList();"> RefreshList </a> <br> <br>

<script>
var urlKey = 'occIDList=600&occParentIDList=600&myLocIDList=30000&myLocParentIDList=30000&companyTypeIDList=&isInterView=1&prj=quick&sj=1'; function StringBuilder() {
this.string = new Array();
} StringBuilder.prototype.Append = function(str) {
this.string.push(str);
}; StringBuilder.prototype.toString = function() {
return this.string.join("");
};  function RefreshList(){
//alert(urlKey);
//$("#dvAD").hide();
//alert(urlKey);
//document.getElementById("dvSummary").innerHTML=" <h5>正在加载，请稍候…… </h5>";
//document.getElementById("dvTitle").innerHTML=" <h5>正在加载，请稍候…… </h5>";
//purge(document.getElementById("dvSummary"));
//$("#chkAllTop")[0].checked=false;
//$("#chkAllBott")[0].checked=false; checkedIndex=",";
//alert(urlKey);
var BaseSb=new StringBuilder();
BaseSb.Append((urlKey));
BaseSb.Append("&curPage=2");
//BaseSb.Append(curPage);
BaseSb.Append("&pageSize=20");
//BaseSb.Append(pageSize);
BaseSb.Append("&recordCount=2000");
//BaseSb.Append(recordCount);
BaseSb.Append("&orderField=");
//BaseSb.Append(orderField);
BaseSb.Append("&order=DESC");
//BaseSb.Append(order);
alert(BaseSb);
alert(BaseSb.toString());
var BaseStr=base64encode(BaseSb.toString());
alert(BaseStr);
var httpurl=new StringBuilder();
httpurl.Append("/GetSearchResult.awp?");
httpurl.Append("jtq=onlyrecord");
httpurl.Append("&urlKey=");
httpurl.Append(BaseStr); } function base64encode(Str){
Str=escape(Str);
var output="";
var chr1,chr2,chr3="";
var enc1,enc2,enc3,enc4="";
var i=0;
do{
chr1=Str.charCodeAt(i++);
chr2=Str.charCodeAt(i++);
chr3=Str.charCodeAt(i++);
enc1=chr1>>2;
enc2=((chr1&3)<<4)|(chr2>>4);
enc3=((chr2&15)<<2)|(chr3>>6);
enc4=chr3&63;
if(isNaN(chr2)){
enc3=enc4=64;
}
else if(isNaN(chr3)){
enc4=64;
} output=output+Str.charAt(enc1)+Str.charAt(enc2)+Str.charAt(enc3)+Str.charAt(enc4); chr1=chr2=chr3="";
enc1=enc2=enc3=enc4="";
}
while(i <Str.length);
return output;
}
</script>
<script> </script>