html - Aligning opposite edges of divs -


i want green box lie immediate bottom left red header always, if user zooms in , out web page.

demo: http://jsfiddle.net/bvqcx/

now, want margin-left property given green box. or red box @ center. can provide me jsfiddle solution? solution must div based layout.

similar question: aligning opposite edges of divs

                         |red box|                |green box|

like this?

http://jsfiddle.net/xx28t/2/

need margin left on header, margin left on header should equal width of green box

margin-left: 20%

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