there are a couple things that could cause this but without seeing the rest of the code we will be unable to help you, because that alone is not going to help us at all...
Please post a url / the whole code when you ask for some help.
that will automatically force whatever element it is attached to be on its own line.
Code:
position: relative;
margin-top: -80px;
that would actually attempt to put some negative margins meaning the element should be cut off. if you were attempting to make the element appear above the parent element you should use top: -[height];
its important to note on that also that you should not use pixels because they are rendered differently across each browser.
missing x
damn them typo's
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