In IE8 enter key in a form does not work

Question

I have a problem that in IE8 the enter does not work to submit a form. I have generated a test page to expose this problem. It seems that displaying the form in the on

Answer 1

Found a working solution.

Make the submit button invisible instead of using display:none;

input#submit {
color: transparent;
background: transparent;
border: 0px;
}