/** VIDEO PREVIEW FUNCTIONS **/

function startLoopVideo(id){
	videoid=id;
	videoloop=1;
	videointerval = setInterval("loopVideo()",500);
}

function endLoopVideo(){
	clearInterval(videointerval);
	document[videoid].src = "http://img.youtube.com/vi/"+videoid+"/1.jpg";
}

function loopVideo(){
	videoloop++;
	if(videoloop==4){
		videoloop=1;
	}
	document[videoid].src = "http://img.youtube.com/vi/"+videoid+"/"+videoloop+".jpg";
}