function validate ()
{
    // required:  biz_name, realname, day_phone and email
    if (document.amgform.biz_name.value == "")
    {
        window.alert('Please supply the name of the business');
        document.amgform.biz_name.focus();
        return false;
    }
    else if (document.amgform.realname.value == "")
    {
        window.alert('Please supply the contact name');
        document.amgform.realname.focus();
        return false;
    }
    else if (document.amgform.day_phone.value == "")
    {
        window.alert('Please supply a phone number');
        document.amgform.day_phone.focus();
        return false;
    }
    else if (document.amgform.email.value == "")
    {
        window.alert('Please supply an email address');
        document.amgform.email.focus();
        return false;
    }
    else
    {
        return true;
    }
}