// Center a positionable element whose name is passed as 
	// a parameter in the current window/frame, and show it
	function centerOnWindow(elemID) {
	// 'obj' is the positionable object
	var obj = getRawObject(elemID);
	// window scroll factors
	var scrollX = 0, scrollY = 0;
	if (document.body && typeof document.body.scrollTop != "undefined") {
		scrollX += document.body.scrollLeft;
		scrollY += document.body.scrollTop;
		if (document.body.parentNode && 
		typeof document.body.parentNode.scrollTop != "undefined") {
		scrollX += document.body.parentNode.scrollLeft;
		scrollY += document.body.parentNode.scrollTop
		}
	} else if (typeof window.pageXOffset != "undefined") {
		scrollX += window.pageXOffset;
		scrollY += window.pageYOffset;
	}
	var x = Math.round((getInsideWindowWidth()/2) - (getObjectWidth(obj)/2)) + scrollX;
	var y = Math.round((getInsideWindowHeight()/2) -  (getObjectHeight(obj)/2)) + scrollY;
	shiftTo(obj, x, y);
	show(obj);
	}
	
	// Special handling for CSS-P redraw bug in Navigator 4
	function handleResize() {
	if (isNN4) {
		// causes extra redraw, but must do it to get banner object color drawn
		location.reload();
	}else {
		centerOnWindow("login");
		centerOnWindow("main");
	}
	}
	// Keep centered during scroll
	function handleScroll() {
	centerOnWindow("login");
	centerOnWindow("main");
	}
	
	window.onresize = handleResize;
	window.onscroll = handleScroll;