Frontend Application (JavaScript)

We need a frontend application that runs in IE 7+ and FF 2+ browsers. The software we need now has to control the application:? * login functions with browser-check, etc. * loading some script- and style-files * adjusting sizes of various elements to the given screen-size and resizing the same elements on a change of the browser window size. * making a few elements draggable * some control function of the main Menu The HTML and css exists already. It would be your task to write the object-oriented JavaScript code. Further details, a more precise description and the HTML and Stylesheet? is included in a zip, we can provide to you.