var center_images= new Array('center1', 'center2');
var centeridx = 0; 
var start_wait = 12000;
var centerimage_interval = 12000;

function center_change()
{
	Effect.Fade(center_images[centeridx], { duration:2.5, from:1.0, to:0.0 });
	
	if (centeridx == center_images.length-1)
		centeridx = 0;
	else
		centeridx++;
	
	Effect.Appear(center_images[centeridx], { duration:2.5, from:0.0, to:1.0 });		
}
function center_init() { setTimeout( 'center_change();start_centerimages();', start_wait); }
function start_centerimages() { setInterval('center_change()',centerimage_interval); }