// ----------------------------------------------------------------------
// Javascript form validation routines.
// Author: Stephen Poley
//
// Simple routines to quickly pick up obvious typos.
// All validation routines return true if executed by an older browser:
// in this case validation must be left to the server.
//
// Update Jun 2005: discovered that reason IE wasn't setting focus was
// due to an IE timing bug. Added 0.1 sec delay to fix.
//
// Update Oct 2005: minor tidy-up: unused parameter removed
//
// Update Jun 2006: minor improvements to variable names and layout
//
// Update Mar 2007: Configure for TopQuotes
// ----------------------------------------------------------------------

var nbsp = 160;		// non-breaking space char
var node_text = 3;	// DOM text node-type
var emptyString = /^\s*$/ ;
var global_valfield;	// retain valfield for timer thread

// --------------------------------------------
//                  trim
// Trim leading/trailing whitespace off string
// --------------------------------------------

function trim(str)
{
  return str.replace(/^\s+|\s+$/g, '');
}


// --------------------------------------------
//                  setfocus
// Delayed focus setting to get around IE bug
// --------------------------------------------

function setFocusDelayed()
{
  global_valfield.focus();
}

function setfocus(valfield)
{
  // save valfield in global variable so value retained when routine exits
  global_valfield = valfield;
  setTimeout( 'setFocusDelayed()', 100 );
}


// --------------------------------------------
//                  msg
// Display warn/error message in HTML element.
// commonCheck routine must have previously been called
// --------------------------------------------

function msg(fld,     // id of element to display message in
             msgtype, // class to give element ("warn" or "error")
             message) // string to display
{
  // setting an empty string can give problems if later set to a 
  // non-empty string, so ensure a space present. (For Mozilla and Opera one could 
  // simply use a space, but IE demands something more, like a non-breaking space.)
  var dispmessage;
  if (emptyString.test(message)) 
    dispmessage = String.fromCharCode(nbsp);    
  else  
    dispmessage = message;

  var elem = document.getElementById(fld);
  elem.firstChild.nodeValue = dispmessage;  
  
  elem.className = msgtype;   // set the CSS class to adjust appearance of message
}

// --------------------------------------------
//            commonCheck
// Common code for all validation routines to:
// (a) check for older / less-equipped browsers
// (b) check if empty fields are required
// Returns true (validation passed), 
//         false (validation failed) or 
//         proceed (don't know yet)
// --------------------------------------------

var proceed = 2;  

function commonCheck    (valfield,   // element to be validated
                         infofield,  // id of element to receive info/error msg
                         required)   // true if required
{
  if (!document.getElementById) 
    return true;  // not available on this browser - leave validation to the server
  var elem = document.getElementById(infofield);
  if (!elem.firstChild) return true;  // not available on this browser 
  if (elem.firstChild.nodeType != node_text) return true;  // infofield is wrong type of node  

  if (emptyString.test(valfield.value)) {
    if (required) {
      msg (infofield, "required", "");  
      setfocus(valfield);
      return false;
    }
    else {
      msg (infofield, "ok", "");   // OK
      return true;  
    }
  }
  return proceed;
}

// --------------------------------------------
//            validatePresent
// Validate if something has been entered
// Returns true if so 
// --------------------------------------------

function validatePresent(valfield,   // element to be validated
                         infofield,  // id of element to receive info/error msg
                         required)   // true if required
{

  var stat = commonCheck (valfield, infofield, required);
  if (stat != proceed) return stat;

  msg (infofield, "ok", "");  
  return true;
}

// --------------------------------------------
//               validateEmail
// Validate if e-mail address
// Returns true if so (and also if could not be executed because of old browser)
// --------------------------------------------

function validateEmail  (valfield,   // element to be validated
                         infofield,  // id of element to receive info/error msg
                         required)   // true if required
{
  var stat = commonCheck (valfield, infofield, required);
  if (stat != proceed) return stat;

  var tfld = trim(valfield.value);  // value of field with whitespace trimmed off
  var email = /^[^@]+@[^@.]+\.[^@]*\w\w$/  ;
  if (!email.test(tfld)) {
    msg (infofield, "error", "Error: e-mail address is not valid.  Please correct.");
    setfocus(valfield);
    return false;
  }

  var email2 = /^[A-Za-z][\w.-]+@\w[\w.-]+\.[\w.-]*[A-Za-z][A-Za-z]$/  ;
  if (!email2.test(tfld)) 
    msg (infofield, "warn", "Warning: Unusual e-mail address.  Please double check.");
  else
    msg (infofield, "ok", "");
  return true;
}

// --------------------------------------------
//               validateEmailConfirmation
// Validate if e-mail address
// Returns true if so (and also if could not be executed because of old browser)
// --------------------------------------------

function validateEmailConfirmation  (valfield1,   // element1 
                         valfield2,   // element2 
                         infofield,  // id of element to receive info/error msg
                         required)   // true if required
{
  if (valfield1.value != valfield2.value) {
    msg (infofield, "error", "Error: Both email addresses should be identical.  Please 'retype'.");
    setfocus(valfield1);
    return false;
  } 
  msg (infofield, "ok", "");
  return true;
}

// --------------------------------------------
//            validateTelnr
// Validate telephone number
// Returns true if so (and also if could not be executed because of old browser)
// Permits spaces, hyphens, brackets and leading +
// --------------------------------------------

function validateTelnr  (valfield,   // element to be validated
                         infofield,  // id of element to receive info/error msg
                         required)   // true if required
{
  var stat = commonCheck (valfield, infofield, required);
  if (stat != proceed) return stat;

  var tfld = trim(valfield.value);  // value of field with whitespace trimmed off
  var telnr = /^\+?[0-9 ()-]+[0-9]$/  ;
  if (!telnr.test(tfld)) {
    msg (infofield, "error", "Error: Phone number is not valid.  Valid characters are numbers, space () - and leading +.  Please correct.");
    setfocus(valfield);
    return false;
   }

  var numdigits = 0;
  for (var j=0; j<tfld.length; j++)
    if (tfld.charAt(j)>='0' && tfld.charAt(j)<='9') numdigits++;

  if (numdigits<6) {
    msg (infofield, "error", "Error: Phone number is not valid.  " + numdigits + " digits is too short.  Please correct.");
    setfocus(valfield);
    return false;
  }

  if (numdigits>15)
    msg (infofield, "error", "Error: Phone number has " + numdigits + " digits.  Please correct.");
  else { 
    if (numdigits<8)
      msg (infofield, "warn", "Warning: Phone number has " + numdigits + " digits.  Please double check.");
    else
      msg (infofield, "ok", "");
  }
  return true;
}

// --------------------------------------------
//            validateYear
// Returns true if so (and also if could not be executed because of old browser)
// Permits spaces, hyphens, brackets and leading +
// --------------------------------------------

function validateYear  (valfield,   // element to be validated
                         infofield,  // id of element to receive info/error msg
                         required)   // true if required
{
  var stat = commonCheck (valfield, infofield, required);
  if (stat != proceed) return stat;

  var tfld = trim(valfield.value);

  var numdigits = 0;
  for (var j=0; j<tfld.length; j++)
    if (tfld.charAt(j)>='0' && tfld.charAt(j)<='9') 
      numdigits++;
    else {
      msg (infofield, "error", "Error: Invalid year.  Year must be YYYY.");
      setfocus(valfield);
      return false;
   }

  if (numdigits<4) {
    msg (infofield, "error", "Error: Invalid year.  Year must be YYYY.");
    setfocus(valfield);
    return false;
  }

  if (tfld<1900) {
    msg (infofield, "error", "Error: Invalid year.  Must be greater than 1900.");
    setfocus(valfield);
    return false;
  }

  if (tfld>2020) {
    msg (infofield, "error", "Error: Invalid year.  Must be less than 2020.");
    setfocus(valfield);
    return false;
  }


  msg (infofield, "ok", "");
  return true;
}

// --------------------------------------------
//            validateYearDOB
// Returns true if so (and also if could not be executed because of old browser)
// Permits spaces, hyphens, brackets and leading +
// --------------------------------------------

function validateYearDOB  (valfield,   // element to be validated
                         infofield,  // id of element to receive info/error msg
                         required)   // true if required
{
  var stat = commonCheck (valfield, infofield, required);
  if (stat != proceed) return stat;

  var stat = validateYear (valfield, infofield, required);
  if (stat != true) return stat;

  var tfld = trim(valfield.value);

  if (tfld>2000) {
    msg (infofield, "error", "Error: Year " + tfld + " is  too high.  Please correct.");
    setfocus(valfield);
    return false;
  }

  if (tfld<1900) {
    msg (infofield, "error", "Error: Year " + tfld + " is too low.  Please correct.");
    setfocus(valfield);
    return false;
  }

  msg (infofield, "ok", "");
  return true;
}


// --------------------------------------------
//            validateYearPast
// Returns true if so (and also if could not be executed because of old browser)
// Permits spaces, hyphens, brackets and leading +
// --------------------------------------------

function validateYearPastXXXXXXXXXXXXX  (valfield,   // element to be validated
                         valfield2,   // element to be validated
                         valfield3,   // element to be validated
                         infofield,  // id of element to receive info/error msg
                         required)   // true if required
{
  var stat = commonCheck (valfield, infofield, required);
  if (stat != proceed) return stat;

  var stat = validateYear (valfield, infofield, required);
  if (stat != true) return stat;

  var year = trim(valfield.value);
  var month = trim(valfield2.value);
  var day = trim(valfield3.value);

  var inDate = year + month + day

  var date = new Date();
  var currDate = (date.getFullYear()*100 + date.getMonth()+1)*100 + date.getDate()

  if (currDate>inDate) {
    msg (infofield, "error", "Error: Date is in the past.");
    setfocus(valfield);
    return false;
  }

  msg (infofield, "ok", "");
  //msg (infofield, "error", "error: " + currDate + " " + inDate);

  return true;

}


// --------------------------------------------
//            validateYearAnnual
// Returns true if so (and also if could not be executed because of old browser)
// Permits spaces, hyphens, brackets and leading +
// --------------------------------------------

function validateYearAnnual  (valfield,   // element to be validated
                         valfield2,   // element to be validated
                         valfield3,   // element to be validated
                         infofield,  // id of element to receive info/error msg
                         required)   // true if required
{

  if (required) {

    if (emptyString.test(valfield.value)) {
      msg (infofield, "required", "");  
      setfocus(valfield);
      return false;
    }

    else {

      // Required and populated - therefore continue with validation below.

      var stat = validateYear (valfield, infofield, required);
      if (stat != true) return stat;

      var year = trim(valfield.value);
      var month = trim(valfield2.value);
      var day = trim(valfield3.value); 
      var inDate = year + month + day
      var date = new Date();
      var currDate = (date.getFullYear()*100 + date.getMonth()+1)*100 + date.getDate()

      if (currDate>inDate) {
        msg (infofield, "error", "Error: Date is in the past.");
        setfocus(valfield);
        return false;
      }

      msg (infofield, "ok", "");
      return true;
    }
  }

  else {

    if (emptyString.test(valfield.value)) 
    {
      msg (infofield, "ok", "");  
      return true;
    }
    else 
    {
      // Not required and populated - therefore request user to delete to avoid confusion.
      msg (infofield, "error", "Error: Not required for single trip policy.  Please delete year.");  
      setfocus(valfield);
      return false;
    }
  }
}




// --------------------------------------------
//            validateYearDepart
// Returns true if so (and also if could not be executed because of old browser)
// Permits spaces, hyphens, brackets and leading +
// --------------------------------------------

function validateYearDepart  (valfield,   // element to be validated
                         valfield2,   // element to be validated
                         valfield3,   // element to be validated
                         infofield,  // id of element to receive info/error msg
                         required)   // true if required
{

  if (required) {

    if (emptyString.test(valfield.value)) {
      msg (infofield, "required", "");  
      setfocus(valfield);
      return false;
    }

    else {

      // Required and populated - therefore continue with validation below.

      var stat = validateYear (valfield, infofield, required);
      if (stat != true) return stat;

      var year = trim(valfield.value);
      var month = trim(valfield2.value);
      var day = trim(valfield3.value); 
      var inDate = year + month + day
      var date = new Date();
      var currDate = (date.getFullYear()*100 + date.getMonth()+1)*100 + date.getDate()

      if (currDate>inDate) {
        msg (infofield, "error", "Error: Date is in the past.");
        setfocus(valfield);
        return false;
      }

      msg (infofield, "ok", "");
      return true;
    }
  }

  else {

    if (emptyString.test(valfield.value)) 
    {
      msg (infofield, "ok", "");  
      return true;
    }
    else 
    {
      // Not required and populated - therefore request user to delete to avoid confusion.
      msg (infofield, "error", "Error: Not required for annual policy.  Please delete year.");  
      setfocus(valfield);
      return false;
    }
  }
}



// --------------------------------------------
//            validateYearReturn
// Returns true if so (and also if could not be executed because of old browser)
// Permits spaces, hyphens, brackets and leading +
// --------------------------------------------

function validateYearReturn  (valfield,   // element to be validated
                         valfield2,   // element to be validated
                         valfield3,   // element to be validated
                         valfield4,   // element to be validated
                         valfield5,   // element to be validated
                         valfield6,   // element to be validated
                         infofield,  // id of element to receive info/error msg
                         required)   // true if required
{

  var year = trim(valfield.value);
  var month = trim(valfield2.value);
  var day = trim(valfield3.value);

  if (required) {

    if (emptyString.test(valfield4.value)) {
      msg (infofield, "required", "");  
      setfocus(valfield4);
      return false;
    }

    else {

      // Required and populated - therefore continue with validation below.

      var stat = validateYear (valfield4, infofield, required);
      if (stat != true) return stat;

      var departDate = year + month + day
      var year1 = trim(valfield4.value);
      var month1 = trim(valfield5.value);
      var day1 = trim(valfield6.value);
      var returnDate = year1 + month1 + day1

      if (departDate>returnDate) {
        msg (infofield, "error", "Error: Return date earlier than depart date.");
        setfocus(valfield4);
        return false;
      }
      else
      {
        msg (infofield, "ok", "");  
        return true;
      }
    }
  }

  else {

    if (emptyString.test(valfield4.value)) 
    {
      msg (infofield, "ok", "");  
      return true;
    }
    else 
    {
      // Not required and populated - therefore request user to delete to avoid confusion.
      msg (infofield, "error", "Error: Not required for annual policy.  Please delete year.");  
      setfocus(valfield4);
      return false;
    }
  }
}


// --------------------------------------------
//            validateGolfAmount
// Validate amount
// Returns true if so (and also if could not be executed because of old browser)
// --------------------------------------------
function validateAmount  (valfield,   // element to be validated
                         infofield,  // id of element to receive info/error msg
                         required)   // true if required
{
  var stat = commonCheck (valfield, infofield, required);
  if (stat != proceed) return stat;

  var tfld = trim(valfield.value);

  var numdigits = 0;
  for (var j=0; j<tfld.length; j++)
    if (tfld.charAt(j)>='0' && tfld.charAt(j)<='9') 
      numdigits++;
    else {
      msg (infofield, "error", "Error: The amount must be a number.  Please correct.");
      setfocus(valfield);
      return false;
   }
  msg (infofield, "ok", "");
  return true;
}