function supports_video(){
	return !!document.createElement('video').canPlayType;
}

function StartHTML5Video(elementid,posterimage,mpvideo,mpvideoipod,oggvideo,xdem,ydem){	
	
	if(supports_video()){
		document.getElementById(elementid).innerHTML = "<img src='" + posterimage + "' />";	
		
		myvideo = document.createElement('video');
		myvideo.setAttribute('width',xdem);
		myvideo.setAttribute('height',ydem);
				
		myvideo.autoplay = true;
		myvideo.controls = true;
		
		mympvideo = document.createElement('source');
		mympvideo.setAttribute('src',mpvideo);
		mympvideo.setAttribute('type',"video/mp4");
		
		mywebmvideo = document.createElement('source');
		mywebmvideo.setAttribute('src',mpvideo.replace(".mp4",".webm"));
		mywebmvideo.setAttribute('type',"video/webm");
		
		mympvideoipod = document.createElement('source');
		mympvideoipod.setAttribute('src',mpvideoipod);
		mympvideoipod.setAttribute('type',"video/mp4");
		
		myogg = document.createElement('source');
		myogg.setAttribute('src',oggvideo);
		myogg.setAttribute('type',"video/ogg");
		
		
		
		if((navigator.userAgent.match(/iPhone/i)) || (navigator.userAgent.match(/iPod/i)) || (navigator.userAgent.match(/iPad/i))){
			myvideo.appendChild(mympvideoipod);
		}else{
			myvideo.appendChild(mympvideo);
		}
		myvideo.appendChild(mywebmvideo);
		myvideo.appendChild(myogg);
		
		document.getElementById(elementid).innerHTML = "";
		document.getElementById(elementid).appendChild(myvideo);		
	}else{
		flowplayer(elementid, "http://www.wbpsystems.com/lib/flowplayer-3.1.5.swf", mpvideo);
	}
	_gaq.push(['_trackEvent', 'HTML5Videos', 'play', mpvideo]);
}