Div with 50% height inside a td without javascript

Is it possible to set div height to 50% of a cell?

For example: http://jsfiddle.net/hyNWy/152/ (updated)

Of course, that doesn't work, but maybe there is a way to set that height开发者_JAVA百科 for the div?

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50% will work if the height of the containing cell is defined with a absolute value, eg: http://jsfiddle.net/xE6v7/