Avoid enter key press to submit form

[huan]

Hi,

I am using ASP.net and VB.net to create a website and
controls on an application form are all runat server.
Since user may press enter key to go to next field
instead of pressing tab key. The form will be submit
without all the information get filled. So that how can I
prevent enter keypress to submit?

Thanks in advance.

Huan