function toggleShowHide(contentShow, contentHide, tab) {
	if(tab == 'video') {
		$('#'+contentShow).show();
		$('#'+contentHide).hide();
		$('#tab_video').attr('src','/public/images/tab_video_on.gif');
		$('#tab_audio').attr('src','/public/images/tab_audio_off.gif');
	} 
	if(tab == 'audio') {
		$('#'+contentShow).show();
		$('#'+contentHide).hide();
		$('#tab_audio').attr('src','/public/images/tab_audio_on.gif');
		$('#tab_video').attr('src','/public/images/tab_video_off.gif');
	}
}