如何在表格中显示漂亮的虚线边框?

I've been struggling with CSS for a couple of hours in order to make a perfect spaced dotted line for my table. I've tried the border property, creating a image and put it as background, repeating it in Y axis, and some other stuff (even in CSS3), but my case is a little more specific than the ones I found out by searching in Google: I have alternated columns and rows classes in my table, and it seems that I can't define the whole row with a continuous border.I've been struggling with CSS for a couple of h