CSS Expert needed: Popup menu with rounded corners

This job is pretty simple for a CSS-skilled person: Please take a look at the attached image. On the left, there is a standard menu, created in ExtJS 4. On the rigth, the menu has got rounded corners - thats your job! We will not provide you any code. So please instantiate a simple layout with two menu buttons, using ExtJS 4, like shown in our image. Then adapt the CSS so you get the desired result. You do not need to code much lines in ExtJS: you can simply use this example [login to view URL]!/example/menu/[login to view URL] and move the menu bar to the bottom, so the menus pop up towards the upper direction. There you go! Please make sure, the solution is compatible with FF, Chrome, IE7+. Please mention NicePopMenu in your application. Regarding the job definition our budget is pretty high. So we are expecting excellent results from you ;-)