get css transition duration of DOM element.

get-transition-duration.js

// jQuery is required for this to work.
// based upon this stackoverflow answer:
// http://stackoverflow.com/a/13008597
function getTransitionDuration( element, with_delay )
{
	var el       = $( element );
	var prefixes = 'moz webkit ms o khtml'.split( ' ' );
	var result   = 0;

	for ( var i = 0; i < prefixes.length; i++ )
	{
		var duration = el.css( '-' + prefixes[i] + '-transition-duration' );

		if ( duration )
		{
			duration = ( duration.indexOf( 'ms' ) >- 1 ) ? parseFloat( duration ) : parseFloat( duration ) * 1000;

			if ( with_delay )
			{
				var delay = el.css( '-' + prefixes[i] + '-transition-delay' );
				duration += ( delay.indexOf( 'ms' ) >- 1 ) ? parseFloat( delay ) : parseFloat( delay ) * 1000;
			}

			result = duration;

			break;
		}
	}

	return result;
}