jQuery Scale DIV

I would like to use this jsfiddle 开发者_高级运维demo or something similar to expand the container div from the center. So the container div can expand to a specific size not a percentage. and the middle div shows. thanks

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Like this?

Note the use of absolute positioning and the z-index for the bottom overlay.

You don't need to hide the middle with jQuery, it will be hidden by default.