How to set default button when press "Enter"

Question

Hi,
I have a form and it has only one button (Submit). When I press "Enter", it can submit the form and do the action. However, when I add another button (Normal button, not submit), it cannot perform submit action directly when I press "Enter".
If we press "Enter" and the form can submit automatically, it is more user-friendly than without this feature. Therefore, may I know the method of set the default button when users press "Enter"?

Answer 1

At first I thought the order of the form controls might matter.  When I run this code:
<cfdump var="#GetTickCount()#">
<form action="TestCfgrid.cfm" method="post">
<input name="x" type="text" />
<input type="button" value="x" />
<input type="submit" />
</form>
While I am in the text box, if I press the enter key the form submits.  I originally tried it with the submit and button inputs in the opposite order.
Note that the enter button will not submit the form if you are in a select control (aka dropdown) or a textarea or if your focus is not on a form element.  That's the default behaviour.  If you want to override that, you'll have to write some javascript.