$(function() {  
  $("#block_search, #block_logo, #kolaz, #block_login, #block_news, #menu, #footer").ifixpng();
  
  $("ul li").hover(
    function(){
      $(this).children().filter("ul").css({visibility:"visible"});
      $(this).addClass("hover");
    },
    function(){
      $(this).children().filter("ul").css({visibility:"hidden"});
      $(this).removeClass("hover");
    });
});