ajax 类型转换

ajax 从后台接受到的var怎么转换成int类型

js代码如下

function getNext(row) {
     　　var url = "../DetailListPhoto?currow="+row;
     　　if (window.XMLHttpRequest) {
             　　req = new XMLHttpRequest();
     　　}else if (window.ActiveXObject) {
             　　req = new ActiveXObject("Microsoft.XMLHTTP");
     　　}
     　　if(req){
             　　req.open("GET",url, true);
             　　req.onreadystatechange = complete;
             　　req.send(null);
     　　}
}
var name=[];
var id=[];
var url=[];
function complete(){
     　　if (req.readyState == 4) {
             　　if (req.status == 200) {
                     　　var cur= req.responseXML.getElementsByTagName("currow")[0].firstChild.nodeValue;
var city = req.responseXML.getElementsByTagName("photo");
           var result="";
                     　　for(var i=0;i<city.length;i++){
       id[i]= city[i].getElementsByTagName("pid")[0].firstChild.nodeValue;
               name[i]= city[i].getElementsByTagName("name")[0].firstChild.nodeValue;
      url[i]= city[i].getElementsByTagName("url")[0].firstChild.nodeValue;
                     　　}
   for (var i=0;i<id.length;i++)
   {
   if(i==0){
     result +='<td width="20"><a href="#" onclick="getNext('+(cur-8)+');" title="上一页"><img src="../images/1.jpg" border="0" /></a></td><td width="100"><a href="../DetailPhoto?id='+
     id[i]+'" title="'+name[i]+'"><img src="'+url[i]+'" width="95" height="93" border="0"></a></td>';
     }else if(i<id.length-1){
     result +='<td width="100"><a href="../DetailPhoto?id='+id[i]+'" title="'+
     name[i]+'"><img src="'+url[i]+'" width="95" height="93" border="0"></a></td>';
     }else if(i==id.length-1&&id.length==8){
     result +='<td width="100"><a href="../DetailPhoto?id='+id[i]+'" title="'+name[i]+'"><img src="'+url[i]+
     '" width="95" height="93" border="0"></a></td><td width="20"><a href="#" onclick="getNext('+(cur+8)+');" title="下一页"><img src="../images/2.jpg" border="0" /></a></td>';
     }else if(i==id.length-1&&id.length<8){
     result +='<td width="100"><a href="../DetailPhoto?id='+id[i]+'" title="'+name[i]+'"><img src="'+url[i]+
  '" width="95" height="93" border="0"></a></td><td width="100"><a href="#" onclick="getNext(0)" title="返回第一张"><img src="../images/photo_back.png" width="95" height="93"  border="0"></img> </a></td><td width="20"><a href="#" onclick="getNext('+(cur+8)+');" title="下一页"><img src="../images/2.jpg" border="0" /></a></td>';
     } 
    }   
      document.getElementById("listphoto").innerHTML=result;
             　　}
     　　}
}
function buildSelect(str,sel) {
     　　sel.options.length=0;
     　　for(var i=0;i<str.length;i++) {
             　　sel.options[sel.options.length]=new Option(str[i],str[i])
     　　}
}
-->[color=red][/color]
</script>