hiding a div Options

[nymph]

okay i fixed it by using a hide span tag...
but the thing is after that i can't close my tags including my div, span, body and html, and they're not automatically closed for me. does this affect the viewing of a website especialy in terms of aesthetics?
thanks

this isn't really xanga related, but i want to hide this phrase that is added on the bottom of all USC sites... this is the code at the end of the page when i view source:

CODE

<div style="display: block; font-family: Verdana, Geneva, Arial; font-size: 10px">
The University of Southern California does not screen or control the content on this website and thus does not guarantee the accuracy, integrity, or quality of such content.  All content on this website is provided by and is the sole responsibility of the person from which such content originated, and such content does not necessarily reflect the opinions of the University administration or the Board of Trustees
</div>

since it doesn't have a div id, and i use divs all over the site, how do i hide this? i have tried giving it a name but it doesn't work

here's the site:

http://www-scf.usc.edu/~deltas/alphaupsilon.html
thanks