function playLesson(sku, id, foldername, movieCode){
		size = 'Large';
		if ((size == "Large") || (size == "large") ){
			winwidth=800;
			winheight=650;
		}
		else{
			winwidth=640;
			winheight=480+50;
		}
		wposx=0;
		wposy=0;
		file =  'http://www.vtc.com/modules/members/lessonPlayEnc.php?size=' + size + '&foldername=' + foldername + '&sku=' + sku + '&id=' + id  + '&movieCode=' + movieCode + '&mode=flv';
		popupWin = window.open(file, "vtcplayer", "status=no,resizable=no,toolbar=no,scrollbars=no,screenX=" + wposx + ",screenY=0,left=" + wposx + ",top=" + wposy + ",width=" + winwidth + ",height=" + winheight);
		popupWin.focus();
}