function JumpToPage(control,key,newIndex)
{
     if (key.length <= 0)
        __doPostBack(control,newIndex);
     else
        parent.location = MakeUrlString(key,newIndex);
}
function MakeUrlString(key,value) { 
    var _key=key;
    var prms=location.search;
    if(prms.length==0) 
        return location.pathname+"?"+_key+"="+value;
        var params=prms.substring(1).split("&"); 
        var newparam=""; var found=false;
        for(i=0;i<params.length;i++) {
           if(params[i].split("=")[0]==_key){
              params[i]=_key+"="+value; found=true; break; 
           } 
        }
   if(found) return location.pathname+"?"+params.join("&");
   else return location+"&"+_key+"="+value;
}