html 5 add url parameter 保证页面无刷新

  <script type="text/javascript">
       //<![CDATA[ 
      function addBranchId(branchId,branchid){
            //var burl = document.location.search.substr(1).split('&');
                var addurl = document.location.href.split("/");
                var port = addurl[5].split("?");
                var ff = port[0]+"?";
                var kvp = document.location.search.substr(1).split('&');
                var add = document.location.search;
                var i=kvp.length; var x; var flag = false;
                while(i--){
                     x = kvp[i].split('=');
                     var num = x[1].split(",");
                     if(x[0]=="branchId" && $.inArray(branchid,num)<0){
                     kvp[i] = x.join('=')+","+branchid;
                         break;
                       }
                    }
                if(add.indexOf("branchId")<0) {
                    kvp[kvp.length] = ["branchId",branchid].join('=');
                 }
                var surl  = kvp.join('&');
                var objstate ={url:surl};    
                history.pushState(objstate,"",ff+surl);
                }
       
      //]]>
    </script>