function checkactionform()
{

// check if firstname was entered
   if (document.forms[0].fname.value == '')
    {
        alert ('You have to enter your first name.');
        return false;

    }

    //check if family name was entered

   else if (document.forms[0].sname.value == '')
    {
        alert ('You have to enter your family name.');
        return false;

    }


// check if email was entered
   else if (document.forms[0].email.value == '')
    {
        alert ('You have to enter a valid email address.');
        return false;

    }

    // check if street was entered
   else if (document.forms[0].street.value == '')
    {
        alert ('You have to enter your street address.');
        return false;

    }

       else if (document.forms[0].zipcode.value == '')
    {
        alert ('You have to enter your town and zip code.');
        return false;

    }

	return true;

}