How can I position a div at the bottom of a table cell?

I have got a div inside a table cell. the cell has 100% height. how do I position that div at the bottom of the table cell.

I also have other divs in that cell that I want to position in the 开发者_如何学Cmiddle and the top

Something like:

td{
position:relative;
}

.mydiv{
position:absolute;
bottom:0;
left:0;
}

Should do the trick?