I\'ve isolated a little test case of IE7\'s z-index bug, but don\'t know how to fix it. I have been playing with z-index all day long.
z-index
Wha
In IE positioned elements generate a new stacking context, starting with a z-index value of 0. Therefore z-index doesn’t work correctly.
Try give the parent element a higher z-index value (can be even higher than the child’s z-index value itself) to fix the bug.