Width in percentage not working after jQuery resizing it's parent

[viaste]

I have a div which I want to be 100% width of it's parent dialog.\[code\]#content { width: 100%; color:white; background: red;}\[/code\]It should this property if I manually resize the dialog, however after manually resizing, if i use the \[code\]animate()\[/code\] on the dialog, it will keep the old-resized width.The same applies to height.http://jsfiddle.net/7gC37/