css - IE7 acronym underline in a fieldset legend -

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i have acronym inside of fieldset/legend:

<fieldset>     <legend>         <acronym>foo</acronym>     </legend> </fieldset>

in firefox gets rendered dotted underline signal user there there if mouseover it.

in ie dotted underline doesn't show up?

i tried forcing in css this: 

style="border-bottom:1px dotted #000000 !important;"

but can't seem show up. ideas?

set acronym's display style inline-block let ie7 show border specify in style.


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