Simple HTML/JavaScript Q. – please help

I am novice at ASP, but am frustrated w/ something that seems so simple HTML. I have a form with a piece of javascript that incorporates a calendar applet, which you select the date, and it places it in the input-textbox. Now when I submit the form, I should be able to reference the value contained in the input box. But my efforts have been fruitless….Here is the code.
(I am commenting out, in case post executes HTML)

<%response.write ???%> name of form or inputtextbox?? I tried both, and get no value.

Thank you for you speedy help!