Need help with onchange event

1

Hi…all

Okay I just need help on how to detech onChange event for 2 input value in textfield…and automatically display on answerstxt textfield…

Ok here’s the scenario I have 3 textfield “value1” “value2” “answertxt”
so what I after is whenever I change the value in either value1 or value2 field it will automatically effect the result in answerstxt…I’ve being try using onChange events but still lost…maybe someone can give me some shed on light how to overcome it…really need help…sorry for the most naive questions here…

below are my attempt so far …


<html>

<head>
<script type="text/javascript">
    function detectChanges(){
            alert(document.form1.value1.value)         
    }
</script>
</head>

<body>
<form name="form1" id="form1">
  <table width="100%" border="0" cellspacing="0" cellpadding="0">
    <tr>
      <th scope="col"><label>
        <input name="value1" type="text" id="value1" onChange="detectChanges()">
      </label></th>
      <th scope="col">X</th>
      <th scope="col"><label>
        <input name="value2" type="text" id="value2" onChange="detectChanges()" >
      </label></th>
      <th scope="col">=</th>
      <th scope="col"><label>
        <input name="answers" type="text" id="answers">
      </label></th>
    </tr>
  </table>
  <p>&nbsp;</p>
  <p>&nbsp;  </p>
</form>
</body>

</html>

Really need help …