var menuids=["menutree1", "menutree2"] //Enter id(s) of UL menus, separated by commas

function buildsubmenus()
{
  for (var i=0; i<menuids.length; i++)
  {
    var ultags=document.getElementById(menuids[i]).getElementsByTagName("ul")
    for (var t=0; t<ultags.length; t++)
    {
      ultags[t].parentNode.getElementsByTagName("a")[0].className="subfolderstyle"
      if (ultags[t].parentNode.parentNode.id==menuids[i]) //if this is a first level submenu
        ultags[t].style.left=ultags[t].parentNode.offsetWidth+"px" //dynamically position first level submenus to be width of main menu item
      else //else if this is a sub level submenu (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.onmouseover = function() {this.getElementsByTagName("ul")[0].style.display="block"}
        ultags[t].parentNode.onmouseout=function(){this.getElementsByTagName("ul")[0].style.display="none"}
    }
  	for (var t=ultags.length-1; t>-1; t--)
    {
      //loop through all sub menus again, and use "display:none" to hide menus (to prevent possible page scrollbars
  		ultags[t].style.visibility="visible"
  		ultags[t].style.display="none"
  	}
  }
}

if (window.addEventListener)
  window.addEventListener("load", buildsubmenus, false)
else if (window.attachEvent)
  window.attachEvent("onload", buildsubmenus)