function openWindow(theURL,winName,features)
	{
	window.open(theURL,winName,features).focus();
	}
	
function closeWindow()
	{
	window.close();
	}
	
function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		logo_bpb_over = newImage("images/logo_bpb_over.gif");
		logo_bpbT_over = newImage("images/logo_bpbT_over.gif");
		preloadFlag = true;
	}
}

function goHistory()
	{
	//window.history.go(-1);
	window.history.back();
	}