function add_to_favorites (user_id) {
		var myAjax = new Ajax.Request('async/add_to_favorites.php',
		  {
			method:'post',
			parameters: {uid:user_id},
			onSuccess: function(transport){
			 var result = transport.responseText.evalJSON(true);
			  if (result.success) {
				  $('action_message_div').innerHTML = 'Added to your favorites';
				  new Effect.BlindDown($('action_message_div'));
				 $('fav_img').src='images/favorite.gif';
				 $('fav_link').href='my/favorites.php';
			  } else {
				  alert(result.error);
			  }
			},
			onFailure: function(){ alert('Communication error...')}
		  });
	return false;
}

function showhide(div_id) {
				  new Effect.toggle(div_id,'slide');
}