function MenuHorizontal() {

  var navItems = document.getElementById("MenuDropDown").getElementsByTagName("li");
  
  for (var i=0; i< navItems.length; i++) {
    if(navItems[i].className == "Menu")
    {
        if(navItems[i].getElementsByTagName('ul')[0] != null)
        {
          navItems[i].onmouseover=function() {
			                                  this.getElementsByTagName('ul')[0].style.display="block";
		                                     }
          navItems[i].onmouseout=function() {
			                                 this.getElementsByTagName('ul')[0].style.display="none";
		                                    }
        }
    }
  }

};