Display file sizes next to download links

gistfile1.js

// Loop all .fetchSize links
$('a.fetchSize').each(function(){

  // Issue an AJAX HEAD request for each one
	var link = this;

	$.ajax({
		type: 'HEAD',
		url: link.href,
		complete: function(xhr){
			var size = humanize(xhr.getResponseHeader('Content-Length'));

			// Append the filesize to each
			$(link).append(' (' + type + ')');
		}
	});
});

function humanize(size){
	var units = ['bytes','KB','MB','GB','TB','PB'];

	var ord = Math.floor( Math.log(size) / Math.log(1024) );
	ord = Math.min( Math.max(0,ord), units.length-1);

	var s = Math.round((size / Math.pow(1024,ord))*100)/100;
	return s + ' ' + units[ord];
}

// html
// <a href="001.html" class="fetchSize">First Trickshot</a>
// <a href="034.html" class="fetchSize">This Trickshot</a>
// <a href="ball.png" class="fetchSize">Ball.png</a>