Jquery UI Tabs Panel Animation

Jquery UI Tabs Panel Animation

I want to be able to animate the panel sliding it in from left to right.

This is what I have:
$("#tabs").tabs({
selected: null,
fx: { width: 'toggle', opacity: 'hide', duration: 'slow', height: '600px'}
}).addClass('ui-tabs-vertical ui-helper-clearfix');

It doesn't do what I want it to. It takes the width and slides from right to left and it isn't exactly what I consider sliding. Any help would be greatly appreciated.