if (document.images) {
    var onImgArray = new Array()
    onImgArray[1] = new Image
    onImgArray[2] = new Image
    onImgArray[3] = new Image
    onImgArray[4] = new Image
    onImgArray[5] = new Image
    onImgArray[1].src = "images/button_home_active.png"
    onImgArray[2].src = "images/button_plugins_active.png"
    onImgArray[3].src = "images/button_downloads_active.png"
    onImgArray[4].src = "images/button_contacts_active.png"

    var offImgArray = new Array()
    offImgArray[1] = new Image
    offImgArray[2] = new Image
    offImgArray[3] = new Image
    offImgArray[4] = new Image
    offImgArray[5] = new Image
    offImgArray[1].src = "images/button_home.png"
    offImgArray[2].src = "images/button_plugins.png"
    offImgArray[3].src = "images/button_downloads.png"
    offImgArray[4].src = "images/button_contacts.png"
}

function useActiveImage(i) {
    if (document.images) {
        document.images["menu" + i].src = onImgArray[i].src
    }
}

function useInactiveImage(i) {
    if (document.images) {
        document.images["menu" + i].src = offImgArray[i].src
    }
}

function hide_email_from_robots(text)
{
    var a,b,c,d,e,f,g,h,i
    a='<a href=\"mai'
    b='ugene'
    c='\" class=\"content\">'
    a+='lto:'
    b+='@'
    e='</a>'
    f=''
    b+='unipro.ru'
    g='<img src=\"'
    h=''
    i='\" alt="Email us." border="0">'
    
    if (f) d=f
    else if (h) d=g+h+i
    else d=b
    result = a+b+c+d+e
    if(text) result = a+b+c+text+e
    document.write(result)
}