function randomImage() {
    var randomNum = Math.ceil(Math.random() * 7);
    switch (randomNum) {
        case 1:
            $('div #image1').addClass('active');
            break;
        case 2:
            $('div #image2').addClass('active');
            break;
        case 3:
            $('div #image3').addClass('active');
            break;
        case 4:
            $('div #image4').addClass('active');
            break;
		case 5:
			$('div #image5').addClass('active');
			break;
		case 6:
            $('div #image6').addClass('active');
            break;
		case 7:
			$('div #image7').addClass('active');
			break;
        default:
            $('div #image1').addClass('active');
            break;
    }
}

function slideSwitch() {
    var $active = $('#slideshow div.active');
    var $next = $active.next('div').length ? $active.next('div') : $('#slideshow div:first');
    $active.addClass('last-active');
    $next.css({ opacity: 0.0 })
            .addClass('active')
            .animate({ opacity: 1.0 }, 1000, function () {
                $active.removeClass('active last-active');
            });
}

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