I'm not sure what you mean by a send field. By default, if there is only one textfield then by hitting the enter key the form is automatically submitted (Gurus: Please correct me if I'm wrong, but I thought this was globally accepted or is it just IE?)
If you want to submit a form in this manner (which I don't suggest,) then you can put an onSubmit handler.
What is it exactly that you are trying to accomplish?
- DB
