jQuery UI datepicker range

Question

Check out this datepicker here: http://destinationtravel.com/sunriver/

Basically you can select the start date and end date right after each other. I want to mimic this using the jQuery UI date picker. I've seen this, but that has 2 separate datepickers that simple select a start and end date not combining it into one date picker showing the range and coloring in the dates in between.

Any ideas, suggestions or examples?

Thanks