function popupWindow(url, name, w, h, x, y) {
	if (!w) w = 580;
	if (!h) h = 372;
	if (!x) x = 150;
	if (!y) y = 150;

	
	 winprops = 'toolbar=no,location=no,' +
    'directories=no,status=no,menubar=no,scrollbars=yes,' +
    'resizable=yes,copyhistory=no,width='+w+',height='+h+',' +
    'screenX='+x+',screenY='+y+',top='+x+',left='+y	
	
	win = window.open(url, name, winprops)
	if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}