css - positioning an element absolutely *within* another element -


this question goes css wizards. i've googled , couldn't find answer. @ point i'm not sure it's possible:

how specify position of element within element, semi-absolutely speak?

i want "put element inner x pixels right of outer's left border, no matter outer happens @ moment."

this might possible javascript, shouldn't possible css?

#inner { position: absolute; left: 10px; }

what css position #inner element 10px left border of 'closest' parent has position value of absolute, relative, or fixed. if no such element found, absolute positioned relative body element, if make sure inner element has parent has position defined css, positioned absolutely within parent.

take @ jsfiddle. first, @ html , css see how constructed, go ahead , use mouse drag either of element around (that's javascript in does, purely demonstration purposes). notice how when drag outer element, inner 1 moves it? doing when drag elements around changing values of top , left properties, , since parent absolute positioned, child element stay @ same spot within no matter move on screen. :d


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