How to undo and redo event in Javascript with browser compatible?

[admin]

I am having a tshirt custom design software tool and have to add the redo and undo event for text which is draggable

<a href="http://wordpress.tshirtecommerce.com/design-online/?product_id=17" rel="nofollow">http://wordpress.tshirtecommerce.com/design-online/?product_id=17</a>

I have tried with undo manager plugin <a href="http://mattjmattj.github.io/simple-undo/" rel="nofollow">http://mattjmattj.github.io/simple-undo/</a>