Ti passo il codice:
codice:<HTML> <HEAD> <SCRIPT> <!-- I=0; function roller() { I=I+1; document.modulo.frase.value=I; clearInterval(timerID); setTimeout("timerID=setInterval('roller()',200)",400); } //--> </SCRIPT> </HEAD> <BODY onLoad="timerID=setInterval('roller()',200)"> <FORM NAME="modulo"> <INPUT TYPE="text" SIZE="50" NAME="frase"> <INPUT TYPE="button" VALUE="Interrompi" onClick="clearInterval(timerID)"> </FORM> </BODY> </HTML>