/* Generic check email function*/
function checkEmail(emailAddy) {
  if (emailAddy.value.length==0)
  {
    return true ;
  }
  if (emailAddy.value.indexOf("@",0) < 1 || emailAddy.value.indexOf(".",0) < 1)
  {
    alert("Please check the field:\n The email address appears incorrectly formed") ;
    emailAddy.focus() ;
	return false ;
  }
  return true ;
}

/* Function to check if year is valid ie. Initial value of "Year" or otherwise it must be a 
   numeric. Don't worry if the person believes they are a few centuries old! */
function checkYear(numberField) {
  allNumeric=true ;
  if (numberField.value.length==0 || numberField.value=="Year")
  {
    return true ;
  }

  for (i=0 ; i<numberField.value.length ; i++)  {    checkChar=numberField.value.charAt(i) ;
    if (checkChar<'0' || checkChar>'9')
	{
	  allNumeric=false ;
	}  
  }
  
  if (allNumeric==false)
  {
    alert("Please check the field:\n Only numbers permitted");
	numberField.focus() ;
	return false ;
  }
  
  return true ;
}

/* generic check for number(ie 0-9) */
function checkNumber(numberField) {
  allNumeric=true ;
  if (numberField.value.length==0)
  {
    return true ;
  }

  for (i=0 ; i<numberField.value.length ; i++)  {    checkChar=numberField.value.charAt(i) ;
    if (checkChar<'0' || checkChar>'9')
	{
	  allNumeric=false ;
	}  
  }
  
  if (allNumeric==false)
  {
    alert("Please check the field:\n Only numbers permitted");
	numberField.value = "";
	numberField.focus(numberField);
	return false ;
  }
  return true ;
}

/* generic phone number checker allowing brackets for prefix */
function checkPhone(phoneField) {
  allNumeric=true ;
  if (phoneField.value.length==0)
  {
    return true ;
  }
  
  for (i=0 ; i<phoneField.value.length ; i++)  {    checkChar=phoneField.value.charAt(i) ;
    if (checkChar!=' ' && checkChar!='\(' && checkChar!='\)'  && (checkChar<'0' || checkChar>'9') )
	{
	  allNumeric=false ;
	}  
  }
  
  if (allNumeric==false)
  {
    alert("Please check the field:\n Only numbers, spaces and \(\) permitted");
	phoneField.focus() ;
	return false ;
  }
  return true ;
}

/* Special purpose routine to check the fields that are supposed to be filled have been filled
   or else return back to the form. */
function tblcustomerForm(tblcustomer) {
  allCorrect=true ;
  
  if (tblcustomer.strCustomerEmail1.value=="" || 
      tblcustomer.strCustomerEmail2.value=="" ||
	  tblcustomer.strCustomerPassword1.value=="" ||
      tblcustomer.strCustomerPassword2.value=="" ||
	  tblcustomer.strCustomerFirstName.value=="" ||
      tblcustomer.strCustomerLastName.value=="" ||
      tblcustomer.strCustomerAddress.value=="" ||
      tblcustomer.strCustomerCity.value=="" ||
      tblcustomer.strCustomerPostcode.value=="" ||
      tblcustomer.strCustomerCountryCode.value=="" ||
	  tblcustomer.strCustomerTelephone.value=="" ) {
    allCorrect=false ;
  }
  if (allCorrect==false)
  {
    alert("Please fill in all fields marked *") ;
	return false ;
  } 
if (tblcustomer.strCustomerEmail1.value != tblcustomer.strCustomerEmail2.value)
  {
    alert("Entered email addresses are not the same")
	tblcustomer.strCustomerEmail2.focus()
	tblcustomer.strCustomerEmail2.select()
	return false 
  } 
if (tblcustomer.strCustomerPassword1.value != tblcustomer.strCustomerPassword2.value)
  {
    alert("Entered passwords are not the same")
	tblcustomer.strCustomerPassword1.focus()
	tblcustomer.strCustomerPassword1.select()
	return false 
  } 
    return true ;
}

function checkoutForm(checkout) {
  allCorrect=true ;
  
  if (checkout.idDelivery.value=="" || 
      checkout.idPayment.value=="" ) {
    allCorrect=false ;
  }
  if (allCorrect==false)
  {
    alert("Please fill in all fields marked *") ;
	return false ;
  } 
    return true ;
}

function emailForm(email) {
  allCorrect=true ;
  
  if (email.strCustomerEmail1.value=="" || 
      email.strCustomerEmail2.value=="" ) {
    allCorrect=false ;
  }
  if (allCorrect==false)
  {
    alert("Please fill in all fields marked *") ;
	return false ;
  } 
    return true ;
}

function billingForm(billing) {
  allCorrect=true ;
  
  if (billing.strCustomerFirstName.value=="" ||
      billing.strCustomerLastName.value=="" ||
      billing.strCustomerAddress.value=="" ||
      billing.strCustomerCity.value=="" ||
      billing.strCustomerPostcode.value=="" ||
      billing.strCustomerCountryCode.value=="" ||
	  billing.strCustomerTelephone.value=="" ) {
    allCorrect=false ;
  }
  if (allCorrect==false)
  {
    alert("Please fill in all fields marked *") ;
	return false ;
  } 
    return true ;
}

function deliveryeditForm(deliveryedit) {
  allCorrect=true ;
  
  if (deliveryedit.strCustomerDeliveryName.value=="" ||
      deliveryedit.strCustomerDeliveryFirstName.value=="" ||
      deliveryedit.strCustomerDeliveryLastName.value=="" ||
      deliveryedit.strCustomerDeliveryAddress.value=="" ||
      deliveryedit.strCustomerDeliveryCity.value=="" ||
      deliveryedit.strCustomerDeliveryPostcode.value=="" ||
      deliveryedit.strCustomerDeliveryCountryCode.value=="" ||
	  deliveryedit.strCustomerDeliveryTelephone.value=="" ) {
    allCorrect=false ;
  }
  if (allCorrect==false)
  {
    alert("Please fill in all fields marked *") ;
	return false ;
  } 
    return true ;
}

function deliveryaddForm(deliveryadd) {
  allCorrect=true ;
  
  if (deliveryadd.strCustomerDeliveryName.value=="" ||
      deliveryadd.strCustomerDeliveryFirstName.value=="" ||
      deliveryadd.strCustomerDeliveryLastName.value=="" ||
      deliveryadd.strCustomerDeliveryAddress.value=="" ||
      deliveryadd.strCustomerDeliveryCity.value=="" ||
      deliveryadd.strCustomerDeliveryPostcode.value=="" ||
      deliveryadd.strCustomerDeliveryCountryCode.value=="" ||
	  deliveryadd.strCustomerDeliveryTelephone.value=="" ) {
    allCorrect=false ;
  }
  if (allCorrect==false)
  {
    alert("Please fill in all fields marked *") ;
	return false ;
  } 
    return true ;
}

function passwordForm(password) {
  allCorrect=true ;
  
  if (password.strCustomerPasswordOld.value=="" ||
      password.strCustomerPassword1.value=="" ||
	  password.strCustomerPassword2.value=="" ) {
    allCorrect=false ;
  }
  if (allCorrect==false)
  {
    alert("Please fill in all fields marked *") ;
	return false ;
  } 
if (password.strCustomerPassword1.value != password.strCustomerPassword2.value)
  {
    alert("Entered passwords are not the same")
	password.strCustomerPassword1.focus()
	password.strCustomerPassword1.select()
	return false 
  } 
    return true ;
}

/* Special purpose routine to check the fields that are supposed to be filled have been filled
   or else return back to the form. */
function contactForm(contact) {
  allCorrect=true ;
  
  if (contact.FirstName.value=="" || 
      contact.LastName.value=="" ||
	  contact.Phone.value=="" ||
	  contact.Email.value=="" ) {
    allCorrect=false ;
  }
  if (allCorrect==false)
  {
    alert("Please fill in all fields marked *") ;
	return false ;
  } 
    return true ;
}