How to Cancel a Submit when Enter Key is Press?

I have a situation as shown in the example below .  I have a form with an action and a submit button.  For most fields on the form (e.g. input_2 below), I am happy with the behavior that the enter key will cause the form to submit.  However for some special fields (e.g. input_1 below), I want to trap the Enter key and not submit the form.

<HTML>
<head>
<script language="JavaScript">
<!--
function keyDownFx(e) {
  // Some code that traps the enter key...
  alert("keyDownFx called...");
  return false;
}
//-->
</script>
</head>
<body>
<form name="form" action="http://www.experts-exchange.com">
<input name="input_1" onkeydown="keyDownFx(event);">
<br>
<input name="input_2">
<br><input type="submit">
</form>
</body>
</HTML>

I have been testing in IE6, but I would really like a solution that is capable of running in NN4+ and IE4+.  Thanks in advance,

Marc
marc_rabilAsked:
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jaysolomonCommented:
sybeCommented:
<script>
function KeyPress() {
    if (window.event.keyCode == 13) {
        window.event.keyCode = 0;
    }
}
</script>
<body onKeyPress="KeyPress();">
jaysolomonCommented:
IE only sybe
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devicCommented:
hurra i am elated and have good idea ;)

====================================
<html>
<head>
<script>
// ;) devic
var isbutton=false;
function notenter()
{
      if(isbutton)return true;
      return false;
}
</script>
</head>

<body>


<form action=http://www.google.com/search onsubmit="return notenter()">
      <input type=text value=hurra name=q>
      <input type=submit onclick="isbutton=true;">
</form>

</body>
</html>
marc_rabilAuthor Commented:
Devic,

If I modify your code with another input (as below), it no longer works (on IE6 anyway). Any idea why?

<html>
<head>
<script>
// ;) devic
var isbutton=false;
function notenter()
{
     if(isbutton)return true;
     return false;
}
</script>
</head>

<body>


<form action=http://www.google.com/search onsubmit="return notenter()">
     <input type=text value=hurra name=q>
     <br><input>
     <input type=submit onclick="isbutton=true;">
</form>

</body>
</html>
devicCommented:
oops, Marc i don't understood yet why.

try this:
=====================
<html>
<head>
<script>
// ;) devic
var isbutton=false;
function notenter()
{
   // alert(isbutton)
      if(isbutton)return true;
    return false;
}
</script>
</head>

<body>


<form action=http://www.google.com/search onsubmit="return notenter()">
    <input type=text value=hurra name=q>
      <input type=text value=hurra name=b>
      <input type=text value=hurra name=c>
      <input type=text value=hurra name=d>
    <input type=submit onmouseover="isbutton=true;" onmouseout="isbutton=false;">
</form>

</body>
</html>

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devicCommented:
anyway i think onmouseover-out is better as onclick, because if you have some validation, you need always change isbutton=, if data is not valid
devicCommented:
marc_rabil, how are you?
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