It looks like Google Calendar the first one on CodeCanyon, but in a simpler way. The calendar manage the time with half hours (so, 48 cells a day), and it authorizes only one event at a T time. It uses HTML / CSS / JS.
This item is ideal if you want to add information about bookings to your rentals website. The Back End is easy to use and can be easily integrated into your own CMS as the Front End can be easily integrated into your website.
Simple jQuery UI date picker extension to allow user to choose date ranges. When user chooses a date, a hidden form is submitted. Uses jQuery 1.6 and jQuery UI 1 .8. Tested in and compatible with IE 6 -9, Firefox, Safari, Chrome, and Opera.