function start_slide() {
   
   if ( $('slide_con') != null) {
    
        first_img = $('slide_con').getFirst('img')
        current_img = first_img;
        slide();
    }
    
}

function slide() {

    current_img.addClass('nodisplay');
    
    new_img = current_img.getNext('img');
   /* alert(new_img);*/
    if (new_img != null){
        new_img.removeClass('nodisplay');
    }else{
        new_img = $('slide_con').getFirst('img');
        new_img.removeClass('nodisplay');
    }
    
    current_img = new_img;
    
    setTimeout("slide()",4000);
}

function hideall() {
    $('impressions').getElements('li').each(function(el){
        el.addClass('hidden');
    })
}