function hide_banner() {
	var oLayer = document.getElementById("banner");
	oLayer.style.display = 'none';
}

function show_banner() {
	var oLayer = document.getElementById("banner");
	oLayer.style.display = 'block';

	document.getElementById("bill").GotoFrame(1);
	document.getElementById("bill").Play();
}

function locate_banner() {
	var oLayer;     // Object
	var iBanWidth;  // Integer
	var iBanHeight; // Integer
	var iBanLeft;   // Integer
	var iBanTop;    // Integer

	oLayer = document.getElementById("banner");

	iBanWidth  = 600;
	iBanHeight = 400;

	iBanLeft = document.body.clientWidth / 2 - iBanWidth / 2;
	iBanTop  = 50;

	oLayer.style.left = iBanLeft + "px";
	oLayer.style.top  = iBanTop  + "px";
}