scroll to top quando chaga no topo a imagem [ sumir ]

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script> <script type="text/javascript" src="http://arrow.scrolltotop.com/arrow24.js"></script> <noscript>Not seeing a <a href="http://www.scrolltotop.com/">Scroll to Top Button</a>? Go to our FAQ page for more info.</noscript> <img src="http://i1155.photobucket.com/albums/p559/scrolltotop/arrow24.png"height="83"title="scroll to top quando chaga no topo a imagem [ sumir ] " width="120" />