function imgChg(imgName,imgSrc){
	document.images[imgName].src = imgSrc;
}

function openSubWin(SubURL){
	ww = 580;
	wh = 600;
	wx = (screen.width - ww) / 2;
	wy = (screen.height - wh) / 2;
	window.open(SubURL,"SubWin","width="+ww+",height="+wh+",left="+wx+",top="+wy+",location=no,menubar=no,scrollbars=yes");
}