function navItemOn(elementID)
{
    var menuElement = document.getElementById(elementID);
    if (!menuElement.className.match("On"))
    {
     menuElement.className =  menuElement.className + "On";
    }
}

function navItemOff(elementID, selectedID)
{
    if (elementID != selectedID)
    {
     var menuElement = document.getElementById(elementID);
     menuElement.className = menuElement.className.replace("On", "");
    }
}

function mouseHover(elementID, defaultID)
{
   if (defaultID != "")
   {
     var defaultElement = document.getElementById(defaultID);
     defaultElement.className = "navOff";
   }

    var listElement = document.getElementById(elementID);
    listElement.className ="navOn";
}

function mouseOut(elementID, defaultID)
{
    var listElement = document.getElementById(elementID);
    listElement.className ="navOff";
    
    if (defaultID != "")
    {
       var defaultElement = document.getElementById(defaultID);
       defaultElement.className = "navOn";
    }

}