if (document.images) 
{
    var normalImages = new Array()
    normalImages[0] = new Image(97,30)
    normalImages[1] = new Image(97,30)
    normalImages[2] = new Image(97,30)
    normalImages[3] = new Image(97,30)

    normalImages[0].src = "/images/icons/aboutus_black.gif"
    normalImages[1].src = "/images/icons/products_black.gif"
    normalImages[2].src = "/images/icons/downloads_black.gif"
    normalImages[3].src = "/images/icons/links_black.gif"

    var activeImages = new Array()
    activeImages[0] = new Image(97,30)
    activeImages[1] = new Image(97,30)
    activeImages[2] = new Image(97,30)
    activeImages[3] = new Image(97,30)

    activeImages[0].src = "/images/icons/aboutus_blue.gif"
    activeImages[1].src = "/images/icons/products_blue.gif"
    activeImages[2].src = "/images/icons/downloads_blue.gif"
    activeImages[3].src = "/images/icons/links_blue.gif"
}

function showNormalImage(i) 
{
    if (document.images) 
    {
        document.images["button"+i].src = normalImages[i].src
    }
}

function showActiveImage(i) 
{
    if (document.images) 
    {
        document.images["button"+i].src = activeImages[i].src
    }
}