Disable enter key in a form

a form has a field and a button. I'm doing some lookup on the button. When I type some values in the field and click on the button, It works fine. On Opera and Firefox, when I type some values in the field and press ENTER key, it works fine, returns the document.

But when I enter a text and press enter instead of pressing that button, browser displays "Form processed"message

Is there any way to disable enter key in the browser.
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ninteen83Author Commented:
Internet explorer displays "Form processed"message ..
//For fields which enters Enter Key from the field
var NS1 = (window.Event) ? 1 : 0;
function checkKey(e1) {
var code1 = (NS1) ? e1.which : event.keyCode;

if (code1 == "13"){
return false;

call this function where ever needed.

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ninteen83Author Commented:
Works fine..

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