function showSubMenu(parent, show)
{
   hideSubMenu();
    ul = parent.getElementsByTagName('ul');
    ul[0].style.display = (show) ? 'block' : 'none';
}

function hideSubMenu() {
   var menu  = document.getElementById('menu1');//parent.parentNode;
    var lis = menu.getElementsByTagName('li');
    for(var i=0;i<lis.length;i++) {
        mul = lis[i].getElementsByTagName('ul');
        if (mul[0] != null) {
            mul[0].style.display = "none";
        }
    }
}

function css_minHeight(nH) {
   minHeight = (nH == undefined) ? 500 : nH;
   var content = document.getElementById('content');
   height = content.offsetHeight;
   if (height < minHeight)
       content.style.height= minHeight + 'px';
}