function playVideo(videoName) {
	openPopUpCenter("VideoSamples/video_play.aspx?VideoName=" + videoName, 400, 340, "scrollbars=no");
}

function openPopUpCenter(pageUrl, width, height, feature) {
	feature += ",width=" + width + ",innerWidth=" + width;
	feature += ",height=" + height + ",innerHeight=" + height;
	if (window.screen) {
		var ah = screen.availHeight - 30;
		var aw = screen.availWidth - 10;
		var xc = (aw - width) / 2;
		var yc = (ah - height) / 2;
		feature += ",left=" + xc + ",screenX=" + xc;
		feature += ",top=" + yc + ",screenY=" + yc;
	}
	return window.open(pageUrl, "PopPage", feature);
}