function popUp(episode, chapter, section){
	var newwindow;
	newwindow = window.open('http://downloads.bbc.co.uk/signsoflife/protected/main.html?' + 'episode=' + episode + '&chapter=' + chapter + '&section=' + section, 'SignsOfLife', 'toolbar=no,resizable=yes,status=no,menubar=no,location=no,scrollbars=noleft=50,top=50,width=790,height=520');
	if(window.focus){newwindow.focus()}
}