<script language="javascript"> function Calcola() { t = document.Perc.t.value; d = document.Perc.d.value; document.Perc.p.value = 100/t*d } </script> <center><b> Metti <i>Totale</i> e <i>Dato</i>. Clicca e ottieni <i>Percentuale</i> <form name="Perc"> Totale = <input type="text" name="t" value="" size=10> Dato = <input type="text" name="d" value="" size=30> <br/> Percentuale = <input type="text" name="p" value="" size=30> (%)<br/> <input type="button" value="clicca" onClick="Calcola()"> </form> </b></center>