Need help on PHP and Joomla project

Hi, I have been working on a project and need some help on a matter. A coder had developed a Joomla component using very advance PHP for me and I need help modifying it. When uploading the component to my test server it works fine, but when uploading it to a clients server it doesnt work in the same way. This is the component on my test server: [login to view URL] If you scroll down the the header showing 'Availability' you will see a calender. When clicking next or previous it works fine. This is the component on the clients server: [login to view URL] If you scroll down to the same area on the page and click on the next or previous buttons, the full calendar does not show as it does from my test server. I need an experienced coder who is comfortable working with advance php code to figure this problem out for me. This should not be too difficult a task for the right coder so please keep your bids low as I am not looking to spend a lot on this. I have attached the file where the code for this component is located for you to have a look at the code. Only bid if you have read the full project description and are confident that you can solve this issue. I have a very tight deadline on this and I have no time to waste. This project needs to be completed by the end of Sunday at the latest. Thanks and happy bidding!