var win = null;
function centerWindow(mypage,myname,w,h,scroll)
{
	LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
	TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
	settings = 'height=' + h +',width=' + w + ',top=' + TopPosition + ',left=' + LeftPosition + ',scrollbars=' + scroll + ',resizable';
	win = window.open(mypage,myname,settings);
	if (win.window.focus) {
		win.window.focus();
	}
}