function checkForm(theform)
{
    if (theform.firstname.value == "")
    {
        alert("Please Enter Your First Name");
        theform.firstname.focus();
        return false;
    }
    
        
    if (theform.zip.value == "")
    {
        alert("Please Enter Your Postal Code");
        theform.zip.focus();
        return false;
    }
    if (theform.email.value == "")
    {
        alert("Please Enter Your Email Address");
        theform.email.focus();
        return false;
    }
    return true;
}