function searcher() {
    var tags = $('tags').value;

    $('resultat').innerHTML = '';
        $('load').innerHTML = '<center><IMG alt="" src="http://www.chevalannonce.com/images/looder.gif"></center>';

    new Ajax.Request('searcher.php?tags='+tags,
           {
           asynchronous:true,
           method: 'get',

        onCreate: function(t){
           $('load').innerHTML = '<center><IMG alt="" src="http://www.chevalannonce.com/images/looder.gif"></center>';
         },
         onSuccess: function(t){
          $('resultat').innerHTML = t.responseText;
                  $('load').innerHTML = '';
         },
         onComplete: function(t){
           $('load').innerHTML = '';
         }
      }
      );
}