var slides= new Array('slide_1', 'slide_2', 'slide_3', 'slide_4', 'slide_5', 'slide_6', 'slide_7', 'slide_8'); 
var i = 0; 
var wait = 4000;

function SlideShow() {
	Effect.Fade(slides[i], { duration:2, from:1.0, to:0.0 }); 
	i++;
	if (i == 7){
		i = 0;
	}	 
	Effect.Appear(slides[i], { duration:2, from:0.0, to:1.0 });
} 

function start_slideshow() { setInterval('SlideShow()',wait); }