function openCenterWindow(url, title, width, height) {
	var left = Math.ceil((window.screen.availWidth - width) / 2);
	var top  = Math.ceil((window.screen.availHeight - height) / 2);
	window.open(url, title, "menubar=no,status=no,scrollbars=no,resizable=yes,width=" + width + ",height=" + height + ",top=" + top + ",left=" + left);
}
function openCenterWindowWithScrollbars(url, title, width, height) {
	var left = Math.ceil((window.screen.availWidth - width) / 2);
	var top  = Math.ceil((window.screen.availHeight - height) / 2);
	window.open(url, title, "menubar=no,status=no,scrollbars=yes,resizable=yes,width=" + width + ",height=" + height + ",top=" + top + ",left=" + left);
}

function bookmark (url, title) {
	window.external.AddFavorite ( url, title );
}