function getKeys() 
{ 
   var keys = new Object(); 
   var queryString = location.search.substring(1); 
   var keyPairs = queryString.split("&"); 
    
   for(var i = 0; i < keyPairs.length; i++) 
   { 
      var position = keyPairs[i].indexOf('='); 
        if (position == -1) continue; 
       
       var keyname = keyPairs[i].substring(0, position ); 
       
       var keyvalue = keyPairs[i].substring(position + 1); 
       keys[keyname] = unescape(keyvalue); 
   } 
   return keys; 
    
  }