codice:
<script language="JavaScript1.2">


//change speed to another integer to alter the scrolling speed. Greater is faster
var timer;
...
...
...
function startit(){
timer=setInterval("scrollwindow()",10)
}
window.onload=initialize
</script>
Nella pagine principale metti:
<input value="start" type=button onclick="if(!I1.timer) {I1.startit()}">
<input value="stop" type=button onclick="if(I1.timer) {I1.clearInterval(I1.timer);I1.timer=''}">

ciao