function MenuOn(subMenuNum){
    if(navigator.appName.charAt(0)=="M"){
        if (navigator.appVersion.indexOf("MSIE 5") != -1 || navigator.appVersion.indexOf("MSIE 6") != -1){
            if(document.getElementById){document.getElementById("submenu"+subMenuNum).style.visibility="visible"}
        }
        else{
            if(document.all){document.all("submenu"+subMenuNum).style.visibility="visible"}
        }
    }
    if(navigator.appName.charAt(0)=="N"){
        if(document.getElementById){document.getElementById("submenu"+subMenuNum).style.visibility="visible"}
        if(document.layers){document.layers["submenu"+subMenuNum].visibility="show"}
    }
}
function MenuOff(subMenuNum){
    if(navigator.appName.charAt(0)=="M"){
        if (navigator.appVersion.indexOf("MSIE 5") != -1 || navigator.appVersion.indexOf("MSIE 6") != -1){
            if(document.getElementById){document.getElementById("submenu"+subMenuNum).style.visibility="hidden"}
        }
        else{
            if(document.all){document.all("submenu"+subMenuNum).style.visibility="hidden"}
        }
    }
    if(navigator.appName.charAt(0)=="N"){
        if(document.getElementById){document.getElementById("submenu"+subMenuNum).style.visibility="hidden"}
        if(document.layers){document.layers["submenu"+subMenuNum].visibility="hide"}
    }
}