var id_num = 0;
var first_image = "";
var second_image = "";

function rotate_banner() {
id_num++;

// Create images to use
switch (id_num) {
    case 1:
	first_image  = "image_1";
	second_image = "image_2";
    break;
    case 2:
	first_image  = "image_2";
	second_image = "image_3";
    break;
     case 3:
	first_image  = "image_3";
	second_image = "image_4";
    break;
     case 4:
	first_image  = "image_4";
	second_image = "image_5";
    break;
    case 5:
	first_image  = "image_5";
	second_image = "image_1";
	id_num = 0;
    break;
}
    $(second_image).style.display = "block" ;
    $(first_image).effect('opacity', {duration: 1000, transition: Fx.Transitions.linear}).start(1,0);
    $(second_image).effect('opacity', {duration: 1000, transition: Fx.Transitions.linear, onComplete: function () { window.setTimeout(rotate_banner, 5000); }}).start(0,1);
    
}

window.addEvent('domready', function() {
    //var num_images = $('bannerHolder').getElements('div.home_banner').length;
    window.setTimeout(rotate_banner, 5000);
});