problem to enter to fullscreen mode when playing video using addEventListener

[Asaf Shay]

i have two files , because i have the line document.getElementById(“aa”).addEventListener(‘play’, asaf, false); when i press play i enter to function asaf , but the video not showing in fullscreen mode, but if i remove the line i mention and i just call to asaf() instead then it’s work good . what is the problem with thw line that i mention ? here is the post on my blog so you can see also the files http://asafshay.wordpress.com/2014/06/22/problem-to-enter-to-fullscreen-mode-when-playing-video-using-addeventlistener/[^]