function GetQueryString(name){

         var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)");

         var r = window.location.search.substr(1).match(reg);

         if(r!=null){

             var b = decodeURI(r[2]).

                 replace(/\+/g," ").

                 replace(/%2B/g,"+").

                 replace(/%22/g,'"').

                 replace(/%27/g,"'").

                 replace(/%2F/g,"/").

                 replace(/%23/g,"#").

                 replace(/%3D/g,"=").

                 replace(/%26/g,"&").

                 replace(/%40/g,"@").

                 replace(/%3B/g,"；").

                 replace(/%3F/g,"?").

                 replace(/%2C/g,",").

                 replace(/%24/g,"$");

             return  b

         }

         return null;

     }