var menuids = ["navigation"]

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.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)