var rand1 = 0;
var useRand = 0;

images = new Array;
images[1] = new Image();
images[1].src = "images/top1.jpg";

images[2] = new Image();
images[2].src = "images/top2.jpg";

images[3] = new Image();
images[3].src = "images/top3.jpg";

images[4] = new Image();
images[4].src = "images/top4.jpg";

images[5] = new Image();
images[5].src = "images/top5.jpg";

images[6] = new Image();
images[6].src = "images/top6.jpg";

function swapPic()
{
	var imgnum = images.length - 1;
	do
	{
		var randnum = Math.random();		
		rand1 = Math.round((imgnum - 1) * randnum) + 1;
	} while (rand1 == useRand);
	
	useRand = rand1;
	document.randimg.src = images[useRand].src;
}

function showMenu(id)
{
	document.getElementById(id).style.visibility = "visible";
}

function hideMenu(id)
{
	document.getElementById(id).style.visibility = "hidden";
}