css - Why does my DIV clip its child DIV when jQuery moves it in IE? -

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i have 2 divs, both position:absolute;, 1 inside other. parent isn't in place can set position:relative without layer of complexity (there lot of other elements around i'd have account put needs be, @ top of page, on everything). child element made stick off bottom of parent.

in chrome, safari, firefox, works splendidly.

in ie, works until jquery moves parent element - @ point parent element clips child, can barely see top of child. feel i've read this, ie clipping child elements, can't seem find answer applies case.

it's pretty simple, basically:

<div id="parent" style="position:absolute;top:0;left:0;">     [content]     <div id="tab" style="position:absolute;bottom:-30px;left:0;width:64px;height:32px;background-image:(...);"></div> </div> <script> $(document).ready( function() {     $("#tab").click(function() {             $("#parent").animate({"top":"-50px"},300);         }); }); </script>

if explicitly set height of parent element shouldn't have issues anymore. if don't know @ render time height should (ie it's dynamic content), should work:

$('#parent').height(function() {     var parentheight = 0;    $('#parent').children().each(function() {         parentheight += $(this).height();    });    return parentheight; });

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