ASP.NET table strange height behavior

Question

I'm working on an ASP.NET web app in VS2010,C#. I've created a table for my menu, it behaves strangely! I'm setting table height to X px, also row and cell heights are all set to X px. But as you can see in the following address, when mouse hovers on cells, cell height is a bit smaller than table height, in fact cell height is X px, but table height is X+4 px!!! my menu is a red bar at top of the page, what is going wrong here?

http://46.4.132.149/nikyar/

I want my hovered cells to be exactly the same height as my table height thanks

Answer 1

To solve it add to your css table border-spacing:0