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

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

    // use this to pull the images in the order they appear in the markup
    var $next =  $active.next().length ? $active.next()
        : $('#slideshow.on 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 );
    $('a').click(function(){
		    if(this.id == 'on'){
			    $('div#slideshow').removeClass().addClass('on');
			    $(this).attr({id:'off'}).text('Pause slideshow');
		    }
		    else if (this.id == 'off'){
			    $('div#slideshow').removeClass();
			    $(this).attr({id:'on'}).text('Play slideshow');
		    }
	    });
    $('#slideshow img').each(function(fadeImgNum){
        if(fadeImgNum == 0){
	       $('div#slideshow').removeClass().removeClass('on');
	       $('a#off').attr({id:'hidden'});
	       
	    }
	    else if(fadeImgNum != 0){
	     $('div#slideshow').removeClass().addClass('on');
	       $('a#hidden').attr({id:'off'});
	    }
	});
});