function horizontal() {

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

}


function vertical() {

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

}