function buildsubmenus_horizontal(){
    var gameSize = document.getElementById("gameSize").innerHTML
	var menuids = new Array(gameSize);
    for (var i=0; i<gameSize; i++){
      menuids[i] = ["treemenu"+[i]]; //Enter id(s) of SuckerTree UL menus, separated by commas
      var ultags=document.getElementById(menuids[i]).getElementsByTagName("ul");
        for (var t=0; t<ultags.length; t++){
            ultags[t].style.top=ultags[t].parentNode.offsetHeight+"px" //dynamically position first level submenus to be height of main menu item
            ultags[t].parentNode.getElementsByTagName("a")[0].className="mainfoldericon"
        	ultags[t].parentNode.onmouseover=function(){
        	this.getElementsByTagName("ul")[0].style.visibility="visible"
        }
        ultags[t].parentNode.onmouseout=function(){
        this.getElementsByTagName("ul")[0].style.visibility="hidden"
        }
        }
      }
    }
   
    if (window.addEventListener)
    window.addEventListener("load", buildsubmenus_horizontal, false)
    else if (window.attachEvent)
    window.attachEvent("onload", buildsubmenus_horizontal)