var menuids=["MainMenu"]; //Enter id(s) of .dropmenu UL menus, separated by commas

function buildsubmenus_horizontal() {
	for(var i = 0; i < menuids.length; i++) {
        var ultags = document.getElementById(menuids[i]).getElementsByTagName("ul");
	    for(var t = 0; t < ultags.length; t++) {
	        if(ultags[t].parentNode.parentNode.id == menuids[i]) { //if this is a first level submenu
	            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";
	        } else { //else if this is a sub level menu (ul)
				ultags[t].style.left = ultags[t-1].getElementsByTagName("a")[0].offsetWidth + "px"; //position menu to the right of menu item that activated it
				ultags[t].parentNode.getElementsByTagName("a")[0].className = "subfoldericon";
	        }
		    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);