ecco questa è la tua pagina completa
codice:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Documento senza titolo</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css">
#nome_id { 
width: 150px; 
height: 100px; 
overflow: hidden; 
padding: 10px; 
background-color: #ccc; 
} 
.nome_classe { 
position: relative; 
font-size: 12px; 
color: #000; 
padding-top: 100px; 
}
</style> 
<script type="text/javascript" language="JavaScript1.2">
<!--
var sp=0;
var scrollon = true;

function swtScroll() {
  if(scrollon) {
    scrtext = (document.getElementById) ? document.getElementById("sctext") : document.all["sctext"];
    maxp = (scrtext.offsetHeight) ? scrtext.offsetHeight : scrtext.style.pixelHeight;
    sp--;
    if (sp < -maxp) sp=0;
    scrtext.style.top = sp;
  }
  setTimeout('swtScroll()',20); // larger number = slower scroll
}
function stop() { scrollon = false; }
function start() { scrollon = true; }
//-->
</script>
</head>

<body onLoad="swtScroll();">
<div id="nome_id" onmouseover="stop();" onmouseout="start();">
<div id="sctext" class="nome_classe">qui il testo</div></div>
</body>
</html>