$(function(){
	$.extend({
	  jYoutube: function( 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";
	    }
	  }
	});	
});
	
function getThumb(id)
{
    var thumb = $.jYoutube($('#' + id).attr('rel'), 'big');
    $('#' + id).attr('src',thumb);
}