ProgressBar is a highly customizable MooTools progress bar class that animates to the desired percentage and can be styled in any manner by CSS.

ProgressBar can be initialized at any time but is generally initialized at the top of the document during the page's normal load. There are no required arguments -- only options.

<div id="put-bar-here2"></div>

var pb = new dwProgressBar({
	container: $('put-bar-here2'),
	startPercentage: 10,
	speed:1000,
	boxID: 'box2',
	percentageID: 'perc2',
	displayID: 'text',
	displayText: true,
	step:15,
	onComplete: function() {
		alert('Done!');
	},
	onChange: function() {
		alert('Changed!');
	}
});

For specific usage and options, please read the documentation or visit http://davidwalsh.name/js/progressbar