function OnSubmitContactForm()
{
    var form = document.email_form;


// begin setup the subject line based on the bu radio
    // save the original subject template
    // in case we pass thru here more than once
    if (OnSubmitContactForm.mailto== null)
        OnSubmitContactForm.mailto= form._mailto.value;
    // replace the magic $$$ with the bu value
    form._mailto.value = 
        OnSubmitContactForm.mailto.replace("$$$", RadioValue(form.business_unit));
// end setup the subject line based on the bu radio

}