It seems like it's something specific to your browser or computer. If we try a 3rd party tool which renders the page in selected browsers, the floating bar looks correct. Try it yourself:
www.browserling.com/browse/win/vista/chr...www.medmantra.com%2F
I'd recommend testing on other computers to see if you have the same issue and then disable any plugins you have enabled in the browsers. You may also want to try while logged into Google and not logged in. Beyond that, there may be something between your computer and your server that's interfering or blocking some content. I don't know what that would be.
I hope that helps,
Alex