$(document).ready(function(){ 
        $(document).pngFix(); 
        $('#nav_block a').mouseover(function(){
            $(this).parent("li").css({background: 'url(/img/button-over.png) 0 0 no-repeat'});
        }).mousedown(function(){
            $(this).parent("li").css({background: 'url(/img/button-down.png) 0 0 no-repeat'});
        }).mouseout(function(){
            $(this).parent("li").css({background: 'url(/img/button.png) 0 0 no-repeat'});
        });
        $('#contact').click(function() {
            $("#container").load('/contactform/wizard');
            return false;
        })
    });