codice:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html lang="it">
<head>
 <title> prova scroll </title>
 <style type="text/css">
  .footer{
	position:relative;
	overflow: hidden; 
	height: 12px; 
        padding:0px;
        border:1px solid black;
  }
  .messaggio{
	position:relative;
	top:-50px;
	font-size:10px;
        font-weight:bold;
	color:#000000;
        margin:0px;
        padding:0px;
	padding-top:12px;
	font-family:verdana;
	width:500px; 
  }
 </style>

 <script language="JavaScript1.2" type="text/javascript" >
	//<![CDATA[
		var sp=0;
		var speed=70;
		function swtScroll() {
		
		scrtext=document.getElementById?document.getElementById("sctext"):document.all["sctext"];
		maxp=scrtext.offsetHeight?scrtext.offsetHeight:scrtext.style.pixelHeight;

		if (sp<-maxp) sp=0;
                
		sp--;
		scrtext.style.top=sp+"px";
                if(((-1*sp)%12)==0) {
		   setTimeout('swtScroll()',1000); // larger number = slower scroll
                } else { 
                   setTimeout('swtScroll()',speed); // larger number = slower scroll
                }

		}
                function ferma() {
                }
                function riparti() {
                  speed=70;
                }
		if (!document.layers)		window.onload=swtScroll;
		
		
	//]]>->
 </script>
</head>
<body>
<div class="footer">

<div id="sctext" class="messaggio" >	
		
			CIAO PROT


		
			Altra prova.... mi leggi? 


		
	</div>	
</div>

<?php
echo "prova";
?>	

</body>
</html>
Sicuramente sbaglio qualcosa nei tag di commento del javascript, potete darmi una mano?
la parte tra i tag php appare come se fosse un commento, provare per credere...

ciao e grazie