function addFriendUnique(userid, friend, lang)
{
	
  var url = 'modules/friends.php';//?go=Contents&act=rate_contents&rating='+ratin
  var listtest = new Ajax.Request(
      url,
      {
        method: 'get',
        parameters: {Suserid: userid, Sfriend: friend, Saction: 'add_unique', Slang: lang},
	   
        onSuccess: function(transport){
		  var response = transport.responseText;
		  //alert('Tu solicitud ha sido enviada');
		  eval(response);
		  
		 
		}/*,
		
		onLoading: function(ok){
		},
		
		onLoaded: function() {
	
		}*/
       
      });
}