var isDOM = document.getElementById ? true : false; 
var isIE4 = document.all && !isDOM  ? true : false;
var isNS4 = document.layers ? true : false;
var isNS  = navigator.appName == "Netscape";

function getRef(id)
{
	if (isDOM) return document.getElementById(id);
	if (isIE4) return document.all[id];
	if (isNS4) return document.layers[id];
}

function getSty(id)
{
	return (isNS4 ? getRef(id) : getRef(id).style);
}

function moveRightEdge()
{
	var yMenuFrom, yMenuTo, yOffset, timeoutNextCheck;

	if (isNS4)
	{
		yMenuFrom   = BannerMenu.top;
		yMenuTo     = windows.pageYOffset + 500;   // À§ÂÊ À§Ä¡
	}
	else if (isDOM)
	{
		yMenuFrom   = parseInt (BannerMenu.style.top, 10);
		yMenuTo     = (isNS ? window.pageYOffset : document.body.scrollTop) + 125; // À§ÂÊ À§Ä¡
	}
	timeoutNextCheck = 500;

	if (yMenuFrom != yMenuTo)
	{
		yOffset = Math.ceil(Math.abs(yMenuTo - yMenuFrom) / 20);
		if (yMenuTo < yMenuFrom)
			yOffset = -yOffset;
		if (isNS4)
			BannerMenu.top += yOffset;
		else if (isDOM)
			BannerMenu.style.top = parseInt (BannerMenu.style.top, 10) + yOffset;
			timeoutNextCheck = 10;
	}
	setTimeout ("moveRightEdge()", timeoutNextCheck);
}

window.onload = function()
{
	if (isNS4) {
		var BannerMenu = document["BannerMenu"];
		BannerMenu.top = top.pageYOffset + 290;
		BannerMenu.visibility = "visible";
		moveRightEdge();
	} else if (isDOM) {
		var BannerMenu = getRef('BannerMenu');
		BannerMenu.style.top = (isNS ? window.pageYOffset : document.body.scrollTop) + 290;
		BannerMenu.style.visibility = "visible";
		moveRightEdge();
	}
}