Mobile detection and download app splash page

Hi – I’d like to redirect mobile users to a lightweight splash page where they can click a link to the relevant app (based on their device, ios, android etc) and phone number. At the moment I’m using Wurfl for the device detection and displaying different content, based on device OS, in a fancybox overlay that loads on page load. There are 2 main problems with this. 1. the device has to support javascript. 2. the page loads behind the overlay which can slow down load time of the page.

Can anyone recommend a way of loading a lightweight splash page for mobile devices. Would this have to be done as a redirect or could it simply be a page on top of the actual landing page?