function getObj(name) {
        if (document.getElementById) {
          this.obj = document.getElementById(name);
          this.style = document.getElementById(name).style;
        } else if (document.all) {
          this.obj = document.all[name];
          this.style = document.all[name].style;
        } else if (document.layers) {
          this.obj = document.layers[name];
          this.style = document.layers[name];
        }
      }

      function writit( id, text) {
        if (document.getElementById) {
          x = document.getElementById(id);
          x.innerHTML = '';
          x.innerHTML = text;
        } else if (document.all) {
          x = document.all[id];
          x.innerHTML = text;
        }
      }

      function dehex(s) { 

        if( (s == null) || (s.length < 1)) {
          return null;
        }

        var re = /%([a-f0-9]{2})/gi; 
        return s.replace( re, function(str,p1,offset,s) { 
          return String.fromCharCode(eval("0x"+p1)) 
        }); 
      } 

      function urldecode() {

        // return a result array even when its emtpy
        var data = new Array();
        do {

          var s = window.location.search;
          if( s == null || s == "") {
            break; // emtpy search 
          }
          if( s.charAt(0) != '?') {
              alert(" search with no question mark? somethings seriously wrong here");
              break;
          }
          s = s.substring(1); // strip the leading ?

          var parts = s.split("&");
          for( p in parts) { 
            var part = parts[p];
            //alert( p + '->' + part);
            var x = part.split("=");
            var name = dehex( x[0].replace( /\+/g," ") );
            var value = true;
            if( 1 < x.length && x[1]) {
                value = dehex( x[1].replace( /\+/g," ") );
            }
            data[name] = value;
          } 
        } while(false);

        // return result, can be empty but not null
        return data;
      }

      function urlparam( key, default_value) {

        var kv = urldecode();
        var value = (kv[key]) ? kv[key] : default_value;

        return value;
      }