function preloadImages() {
if (document.images)
	{
	var backup_roll = new Image
		backup_roll.src = "images/btn_backup_over.gif"
	var continue_roll = new Image
		continue_roll.src = "images/btn_continue_over.gif"
	var backhillside_roll = new Image
		backhillside_roll.src = "images/btn_backhillside_over.gif"
	var backgem_roll = new Image
		backgem_roll.src = "images/btn_backgem_over.gif"
	var backjail_roll = new Image
		backjail_roll.src = "images/btn_backjail_over.gif"
	}
}

function changeImages(sName,sImage)
	{
	if (document.images)
		{
		document.images[sName].src = sImage
		}
	}

function openWindow(theURL,winName,features)
	{
	window.open(theURL,winName,features).focus();
	}

function closeWindow()
	{
	window.close();
	}

if (document.layers)
	{
	origWidth = innerWidth;
	origHeight = innerHeight;
	}
function reloadPage()
	{
	if (innerWidth != origWidth || innerHeight != origHeight)
	location.reload();
	}
if (document.layers)
	onresize=reloadPage;
	
function goHistory()
	{
	history.back();
	}