var banners=new Array(8);
var i = 0;
//alert (banners.length);
for (i=0; i<banners.length; i++) {
	banners[i]= new Image();
	banners[i].src="banners/banner"+(i+1)+".jpg";
//alert (i+": "+banners[i].src);
}

var ban_num=1;

function rand_banner() {
	var ele = document.getElementById("banner");
	var i=(Math.floor(Math.random()*8));
	ele.src=banners[i].src;
}

function seq_banner() {
	var ele = document.getElementById("banner");
	ele.src=banners[ban_num].src;
	ban_num++;
	if (ban_num > banners.length) ban_num=1;
}

function rotate_banner() {
//alert('rotate');
	setTimeout('rotate_banner()',4000);
	rand_banner();
}

//window.onload=rotate_banner();