var popWin = null;
function openWindow(url,w,h) {
	closeWin();
	winW = w; winH = h;
	winLeft = 100; winTop = 100;
	if (navigator.appName.indexOf('Netscape') > -1) {
		winLeft = window.screenX + (innerWidth - winW)/2;
		if (innerHeight < winH + 65) {
			winTop = window.screenY + (innerHeight - winH)/2 + 110;
		}
		else {
			winTop = window.screenY + 145;
		}
	}
	else {//for IE
		winLeft = window.screenLeft + (document.body.offsetWidth - winW)/2;
		if (document.body.offsetHeight < winH + 65) {winTop = window.screenTop + (document.body.offsetHeight - winH)/2;}
		else {winTop = window.screenTop + 35;}
	}
	settings = '"scrollbars=yes,resizable=no,status=no,width='+winW+',height='+winH+',left='+winLeft+',top='+winTop+'"';
	popWin = window.open(url,'newWin',settings);
	popWin.focus();
}
function closeWin() {
	if (popWin && !popWin.closed) {
		popWin.close();
	}
	popWin = null;
}