function slideSwitch() {
    var $active = $('#left_wrapper div.borderbox.active');

    if ( $active.length == 0 ) $active = $('#left_wrapper div.borderbox:last');

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

	$active.fadeOut("slow", function() {
		$(this).removeClass("active");
	$next.fadeIn().addClass("active");
	});
}

$(function() {
	$("#left_wrapper div:first").addClass('active');
    setInterval( "slideSwitch()", 20000 );
});