function getScreen( url, size ) {
	if(url === null){ return ""; } size = (size === null) ? "big" : size; var vid; var results;
	results = url.match("[\\?&]v=([^&#]*)");
	
	vid = ( results === null ) ? url : results[1];

	if(size == "small"){
		
	return "http://img.youtube.com/vi/"+vid+"/2.jpg"; }
	else {
	return "http://img.youtube.com/vi/"+vid+"/0.jpg"; }
}