Passing Form Values

Greetings All, Another question for today. I have a form. When the form is submitted I want to values passed to a pop-up window. I am aware of the need for Javascript for the pop-up window, but how do I get the values from the form passed to the new window so I can use them in further scripts. I can write the javascript to do the popup window and use the onSubmit command, but I cannot figure out how to pass the values with a regular submit button. Thanks Phillip