function changeBackgroundRestore(target)
{
    if (target == 1)
    {
        document.getElementById('nav' + target).style.backgroundImage = 'url(/images/navmain_left.gif)';
        document.getElementById('nav' + target).style.backgroundRepeat = 'no-repeat';
        target++;
        document.getElementById('nav' + target).style.backgroundImage = 'url(/images/background_navmain.gif)';
        document.getElementById('nav' + target).style.backgroundRepeat = 'no-repeat';
    }
    else if (target == 5)
    {
        document.getElementById('nav' + target).style.backgroundImage = 'url(/images/background_navmain.gif)';
        document.getElementById('nav' + target).style.backgroundRepeat = 'no-repeat';
        target++;
        document.getElementById('nav' + target).style.backgroundImage = 'url(/images/navmain_last.gif)';
        document.getElementById('nav' + target).style.backgroundRepeat = 'no-repeat';
    }
    else if (target == 6)
    {
        document.getElementById('nav' + target).style.backgroundImage = 'url(/images/navmain_last.gif)';
        document.getElementById('nav' + target).style.backgroundRepeat = 'no-repeat';
    }
    else
    {
        document.getElementById('nav' + target).style.backgroundImage = 'url(/images/background_navmain.gif)';
        document.getElementById('nav' + target).style.backgroundRepeat = 'no-repeat';
        target++;
        document.getElementById('nav' + target).style.backgroundImage = 'url(/images/background_navmain.gif)';
        document.getElementById('nav' + target).style.backgroundRepeat = 'no-repeat';
    }
}

function changeBackground(target)
{
    if (target == 1)
    {
        document.getElementById('nav' + target).style.backgroundImage = 'url(/images/background_navmain_left_hov.gif)';
        document.getElementById('nav' + target).style.backgroundRepeat = 'no-repeat';
        target++;
        document.getElementById('nav' + target).style.backgroundImage = 'url(/images/background_navmain_right.gif)';
        document.getElementById('nav' + target).style.backgroundRepeat = 'no-repeat';

    }
    else if (target == 5)
    {
        document.getElementById('nav' + target).style.backgroundImage = 'url(/images/background_navmain_hover.gif)';
        document.getElementById('nav' + target).style.backgroundRepeat = 'no-repeat';
        target++;
        document.getElementById('nav' + target).style.backgroundImage = 'url(/images/background_navmain_last_rig.gif)';
        document.getElementById('nav' + target).style.backgroundRepeat = 'no-repeat';

    }
    else if (target == 6)
    {
        document.getElementById('nav' + target).style.backgroundImage = 'url(/images/background_navmain_last_hov.gif)';
        document.getElementById('nav' + target).style.backgroundRepeat = 'no-repeat';

    }
    else
    {
        document.getElementById('nav' + target).style.backgroundImage = 'url(/images/background_navmain_hover.gif)';
        document.getElementById('nav' + target).style.backgroundRepeat = 'no-repeat';
        target++;
        document.getElementById('nav' + target).style.backgroundImage = 'url(/images/background_navmain_right.gif)';
        document.getElementById('nav' + target).style.backgroundRepeat = 'no-repeat';
    }
}