function showMenu( divNum )
{
    if (getIdProperty( "s" + divNum, "display") != "block" )
    {
        setIdProperty("s" + divNum, "display", "block");
        document.images["i" + divNum].src = "../images/minus.png";
    }
    else
    {
        setIdProperty("s" + divNum, "display", "none");
        document.images["i" + divNum].src = "../images/plus.png";
    }
}
setBrowser();