javascript 解析object js解析url参数为对象

function parseQueryString(url)
{
   var obj={};
   var keyvalue=[];
   var key="",value="";       
   var paraString=url.substring(url.indexOf("?")+1,url.length).split("&");
   for(var i in paraString)
   {
      keyvalue=paraString[i].split("=");
      key=keyvalue[0];
      value=keyvalue[1];
      obj[key]=value;            
   }        
   return obj;
}