function centerWindow() {
	var xMax = document.body.clientWidth, yMax = document.body.clientHeight;

	var xOffset = (xMax-200)/2+550, yOffset = (yMax+500)/2-200; 
	//Á߽ɿ¡¼­ ¿À¸¥ÂÊÀ¸·Î 200, ¾Æ·¡·Î 40Çȼ¿¿¡ Ç×»ó À§Ä¡ÇÏ´Â ·¹À̾î
	var divMenu = document.all['idAdCorner'].style;
	divMenu.top = yOffset;
	divMenu.left = xOffset;
}

var nAdCornerHeight = 230; //bottom°úÀÇ °£°Ý
var nAdCornerMarginX = 0;
var nAdCornerMarginY = 350;
var nScrollBarWidth = 16;
var nScrollBarHeight = 16;
var nInterval = 50;

function setup(){
     
	window.setInterval ("AdCornerMove();", nInterval);
}
    
function AdCornerMove (){
	var newPos, oldPos;

	document.body.scrollLeft;
	oldPos = idAdCorner.style.pixelTop;
	newPos = document.body.clientHeight - nAdCornerHeight - nAdCornerMarginY + document.body.scrollTop;
     
	if ( oldPos != newPos ) {
		idAdCorner.style.pixelTop = oldPos + ( newPos - oldPos ) * 0.3;
	}
}