function toggleMenu(link, sign){
   var subCategories = link.getElementsByTagName('ul')[0];
   if(0 == sign){
       subCategories.style.display = 'none';
   }else{
       subCategories.style.display = 'block';
       subCategories.style.left = '0px';
       subCategories.style.top = subCategories.parentNode.offsetHeight + 'px';
   }
}

function toggleImage(link, sign){
    var image = link.nextSibling;
    if(0 == sign){
        image.style.display = 'none';
    }else{
        image.style.display = 'block';
        image.style.position = 'absolute';
    }
}