function slideSwitch()
{
    var $active = $('.slider-image div.active');

    if ( $active.length == 0 ) $active = $('.slider-image div:last');

    var $next =  $active.next().length ? $active.next() : $('.slider-image div:first');
    
    $active.addClass('last-active');

    $next.css({opacity: 0.0}).addClass('active').animate({opacity: 1.0}, 2000, function()
	{
 		$active.removeClass('active last-active');
 	});
}

$(function()
{
    setInterval( "slideSwitch()", 4000 );
});