[javascript] How to pause a YouTube player when hiding the iframe?

RobW's way worked great for me. For people using jQuery here's a simplified version that I ended up using:

var iframe = $(video_player_div).find('iframe');

var src = $(iframe).attr('src');      

$(iframe).attr('src', '').attr('src', src);

In this example "video_player" is a parent div containing the iframe.