function slideSwitch(toset) {
    var active = $('#screenshot IMG.active');
    var buttonactive = $('#slide-buttons DIV.red');

    if ( active.length == 0 ) active = $('#screenshot IMG:last');
    if ( buttonactive.length == 0 ) buttonactive = $('#slide-buttons DIV:last');
	
    
    var next =  active.next().length ? active.next() : $('#screenshot IMG:first');
   
    var buttonnext =  buttonactive.next().length ? buttonactive.next() : $('#slide-buttons DIV:first');
    if(toset !== -1){
        next = $('#screenshot IMG:eq('+toset+')');
        buttonnext = $('#slide-buttons DIV:eq('+toset+')');   
    }

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

    next.css({opacity: 0.0})
        .addClass('active')
        .animate({opacity: 1.0}, 1000, function() {
            active.removeClass('active last-active');
        });
        
    buttonnext.css({opacity: 0.0})
        .addClass('red')
        .animate({opacity: 1.0}, 10, function() {
            buttonactive.removeClass('red last-active');
        });

}

$(function() {
    setInterval( "slideSwitch(-1)", 9000 );
});