function ChangePage(id) {
    $("#" + id).css({background: 'url(Images/menu_on.png) no-repeat'});
}

function slideSwitch() {
    var $active = $('#slideshow IMG.active');

    if ($active.length == 0) $active = $('#slideshow IMG:last');

    // use this to pull the images in the order they appear in the markup
    var $next = $active.next().length ? $active.next()
        : $('#slideshow IMG:first');

    // uncomment the 3 lines below to pull the images in random order

    // var $sibs  = $active.siblings();
    // var rndNum = Math.floor(Math.random() * $sibs.length );
    // var $next  = $( $sibs[ rndNum ] );


    $active.addClass('last-active');

    $next.css({ opacity: 0.0 })
        .addClass('active')
        .animate({ opacity: 1.0 }, 1000, function() {
            $active.removeClass('active last-active');
        });
}

$(function() {
    setInterval("slideSwitch()", 5000);
});