function OpenWin(URL,W,H,Name) {
	var winl = (screen.width - W)/2;	
	var wint = (screen.height - H)/2;
	w = window.open(URL, Name, "status=no,toolbar=no,directories=no,menubar=no,scrollbars=no,width="+W+",height="+H+",top="+wint+",left="+winl+",screenX="+winl+",screenY="+wint);
	if (window.focus) {w.focus()}
}
function changeBg(sObj,sNewBg) {
	obj = document.getElementById(sObj);
	if (obj != null) obj.style.backgroundColor = sNewBg;		
}