Checkout Webpage edited to work on all platforms (all browsers and mobile devices)

I am looking to have an expert review the page [login to view URL] and edit it so that it works on all platforms. Currently it works on some browsers but not all. It has been reported that there are issues with internet explorer as well as firefox. I would also like it to work from all mobile devices. It has been reported that it does not work on the iPad. The page has been build but does not work on all platforms. I would like to work with someone to review it and confirm that all processes work on all possible platforms. I want this in next two [login to view URL] please bid if you can start right [login to view URL] milestone [login to view URL] completion payment will be [login to view URL] is 50$.