Forbid divs to wrap around other divs?

Is there a way to forbid div wrap other div here http开发者_JAVA百科://jsfiddle.net/MaL5k/1/ ? But without repeating size of left div like done here http://jsfiddle.net/MaL5k/2/

It's seems obvios there should be an option to forbid div content wrap other div content and just act as it a square block.

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Already found a solution: using overflow:hidden; http://jsfiddle.net/MaL5k/7/

EDIT: Doesn't work in IE6... but who cares about it anymore (=