Inspired by the great idea of David Walsh’s jQuery topLink Plugin, I made a similar plugin but with two key differences, this one does not require you to add extra html markup or extra plugins to function. It will only work when JavaScript is turned on ( on purpose ), It’s easy to setup with only one line of code, and it works cross-browser nicely ( Tested: IE6-8, FF, Safari ).Optionally it can benefit from the jQuery Easing plugin with a different easing animation for the page scrolling.
Animation Plugins Web