javascript获取url参数的方法

function GetRequest()  
{  
    var url  =  location .search; //获取url中"?"符后的字串  
    var theRequest  =  new  Object();  
    if(url.indexOf("?") != -1)  
    {  
        var str  =  url .substr(1);  
        var strs  = str.split("&");  
        for(var i  =  0 ; i  <   strs.length ; i ++)  
        {  
            theRequest[strs[i].split("=")[0]]=unescape(strs[i].split("=")[1]);  
        }  
    }  
    return theRequest;  
}