//*********************************************************************************************************************************
//********************************************      EMAIL VALIDATION FUNCTIONS     ************************************************
//*********************************************************************************************************************************

function isEmailAddr(email)
{
  var result = false;
  var theStr = new String(email);
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
 result = true;
  }
  return result;
}
 
function validRequired(formField,fieldLabel)
{
 var result = true;
 
 if (formField.value == "")
 {
  alert(fieldLabel);
  formField.focus();
  result = false;
 }
 
 return result;
}
 
function allDigits(str)
{
 return inValidCharSet(str,"0123456789");
}
 
function inValidCharSet(str,charset)
{
 var result = true;
 
 // Note: doesn't use regular expressions to avoid early Mac browser bugs 
 for (var i=0;i<str.length;i++)
  if (charset.indexOf(str.substr(i,1))<0)
  {
   result = false;
   break;
  }
 
 return result;
}
 
function validEmail(formField,fieldLabel,required)
{
 var result = true;
 
 if (required && !validRequired(formField,fieldLabel))
  result = false;
 
 if (result && ((formField.value.length < 3) || !isEmailAddr(formField.value)) )
 {
  alert("Please enter a complete email address in the form: yourname@yourdomain.com");
  formField.focus();
  result = false;
 }
   
  return result;
 
}
 
function validNum(formField,fieldLabel,required)
{
 var result = true;
 
 if (required && !validRequired(formField,fieldLabel))
  result = false;
  
  if (result)
  {
   if (!allDigits(formField.value))
   {
    alert('Please enter a number for the "' + fieldLabel +'" field.');
   formField.focus();  
   result = false;
  }
 } 
 
 return result;
}
 

function validInt(formField,fieldLabel,required)
{
 var result = true;
 
 if (required && !validRequired(formField,fieldLabel))
  result = false;
  
  if (result)
  {
   var num = parseInt(formField.value,10);
   if (isNaN(num))
   {
    alert('Please enter a number for the "' + fieldLabel +'" field.');
   formField.focus();  
   result = false;
  }
 } 
 
 return result;
}
 

function validDate(formField,fieldLabel,required)
{
 var result = true;
 
 if (required && !validRequired(formField,fieldLabel))
  result = false;
  
  if (result)
  {
   var elems = formField.value.split("/");
   
   result = (elems.length == 3); // should be three components
   
   if (result)
   {
    var month = parseInt(elems[0],10);
     var day = parseInt(elems[1],10);
    var year = parseInt(elems[2],10);
   result = allDigits(elems[0]) && (month > 0) && (month < 13) &&
      allDigits(elems[1]) && (day > 0) && (day < 32) &&
      allDigits(elems[2]) && ((elems[2].length == 2) || (elems[2].length == 4));
   }
   
    if (!result)
   {
    alert('Please enter a date in the format MM/DD/YYYY for the "' + fieldLabel +'" field.');
   formField.focus();  
  }
 } 
 
 return result;
}
 
function validateForm(petitionForm)
{
 // Customize these calls for your form

 // Start ------->

if (!validRequired(petitionForm.txtFirstName,"You must enter your First Name"))
 	 return false;
	 
if (!validRequired(petitionForm.txtSurname,"You must enter your Surname"))
 	 return false;
  
if (!validEmail(petitionForm.txtEmail,"Please enter a valid email address so we can contact you"))
  return false;
  
if (!validRequired(petitionForm.txtAddress,"You must enter an address"))
	 return false;
	 
if (!validRequired(petitionForm.txtCityTown,"You must enter your City or Town"))
 	 return false;
	 
if (!validRequired(petitionForm.txtCounty,"You must enter your County"))
 	 return false;
	 
 return true;
}

//*********************************************************************************************************************************
//********************************************     END EMAIL VALIDATION FUNCTIONS     *********************************************
//*********************************************************************************************************************************