function switchContent()
{
	element_video = document.getElementById('content-video-box');
	element_image = document.getElementById('content-image-box');
	element_play = document.getElementById('video_play');

	element_image.style.display = 'none';
	element_play.style.display = 'none';
	element_video.style.display = '';
}

function setDisplaySwitch(element_s)
{
	if(element_s){
		element_o = document.getElementById(element_s);
		if(element_o)
			element_o.style.display = (element_o.style.display == 'none') ? '' : 'none';
	}
}