【JavaScript】取得QueryString

<script language="javascript">
            var url=location.search;
            var Request = new Object();
            if(url.indexOf("?")!=-1)
            {
            var str = url.substr(1)
            strs = str.split("&");
            for(var i=0;i<strs.length;i++)
            {
 　                Request[strs[i ].split("=")[0]]=unescape(strs[ i].split("=")[1]);
            }
            }
            var q1 = Request["q1"]
        </script>