js获取url参数的方法

<script language="javascript" type="text/javascript">
//js获取url参数的function
function request(paras){
var url = location.href;
var paraString = url.substring(url.indexOf("?")+1,url.length).split("&");
var paraObj = {}
for (i=0; j=paraString[i]; i++){
paraObj[j.substring(0,j.indexOf("=")).toLowerCase()] = j.substring(j.indexOf
("=")+1,j.length);
}
var returnValue = paraObj[paras.toLowerCase()];
if(typeof(returnValue)=="undefined"){
return "";
}else{
return returnValue;
}
}
var theurl
theurl=request("url");
if (theurl!=''){
location=theurl
}
</script>

使用方法：

var url=window.location.href

requesst(url);