var currentVideo = 0;

function showVideo(idx)
{
	// Try to get elements
	var link = document.getElementById("video_link"+idx);
	var video = document.getElementById("video"+idx);
	var desc = document.getElementById("video_desc"+idx);
	var prevLink = document.getElementById("video_link"+currentVideo);
	var prevVideo = document.getElementById("video"+currentVideo);
	var prevDesc = document.getElementById("video_desc"+currentVideo);
	
	// Check that we got all the elements
	if (link != null && video != null && desc != null && prevLink != null && prevVideo != null && prevDesc != null)
	{
		// Change links classes
		prevLink.className = "link";
		link.className = "active";
		
		// Change video object classes
		prevVideo.className = "hidden";
		video.className = "visible";
		
		// Change description classes
		prevDesc.className = "hidden";
		desc.className = "visible";
		
		// Check variable for current video
		currentVideo = idx;
	} 
}