function triggerSubMenu(parentMenu) {
    parentMenuClass = parentMenu.className;
    if (parentMenuClass == null ) parentMenuClass = "";
    if (parentMenuClass != "open") {
        if (parentMenuClass == "") parentMenu.className = "show";
        else if (parentMenuClass == "show") parentMenu.className = "";
        children = parentMenu.getElementsByTagName("ul");
        if (children != null && children.length != 0) {
            subMenuDisplay = children[0].style.display;
            if (subMenuDisplay == "block") children[0].style.display = "none";
            else children[0].style.display = "block";
        }
    }
}
function setBannerImage(numOfImages) {
    randomNum = Math.floor(Math.random()*numOfImages)+1;
    bannerImg = YAHOO.util.Dom.get("bannerImage");
    bannerImg.src = "/images/layout/banners/home"+randomNum+".jpg"
}
function setNavHeight() {
    var contentAreaHeight = YAHOO.util.Dom.get("contentArea").clientHeight;
    if (contentAreaHeight == null || contentAreaHeight == "" || contentAreaHeight == 0) {
        var contentAreaRegion = YAHOO.util.Dom.getRegion(YAHOO.util.Dom.get("contentArea"));
        contentAreaHeight = contentAreaRegion.bottom - contentAreaRegion.top;
    }
    if (contentAreaHeight > 555) {
    //alert("contentAreaHeight = "+contentAreaHeight);
        YAHOO.util.Dom.get("navigation").style.height = contentAreaHeight+"px";
    }
}