// ----------------------------------------------------------------------
// 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
// ----------------------------------------------------------------------

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, "error", "*");  
      setfocus(valfield);
      return false;
    }
    else {
      msg (infofield, "warn", "");   // OK
      return true;  
    }
  }
  return proceed;
}

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

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

  msg (infofield, "warn", "");  
  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", "*");
    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", "*");
  else
    msg (infofield, "warn", "");
  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", "*");
    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<7) {
    msg (infofield, "error", "*");
    setfocus(valfield);
    return false;
  }

  if (numdigits>14)
    msg (infofield, "warn", "*");
  else { 
    if (numdigits<10)
      msg (infofield, "warn", "*");
    else
      msg (infofield, "warn", "");
  }
  return true;
}


// --------------------------------------------
//		Validate TASKE Lock Number
// set all the possible variations and compare the input
// also test the length of the input
// Variable Guide
// 0 = number
// a = letter
// & = alphanumeric
// v = version (static)
// --------------------------------------------

function validateTTlock  (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 ttfldlen = tfld.length;

	if (ttfldlen<8) {
    	msg (infofield, "error", "*");
    	setfocus(valfield);
    	return false;	
	}

/*	var ttlocknum1 = /^[a-zA-Z]{2}\d{6}$/; 								//aa000000
	var ttlocknum2 = /^[a-zA-Z]{2}\d{6}[vV]\d{2}[a-zA-Z]{2}\d[a-zA-Z]$/;	//aa000000v00aa0a
	var ttlocknum3 = /^\d\.\d{7}[vV]\d{2}[a-zA-Z]{2}\d[a-zA-Z]$/;			//0.0000000v00aa0a
	var ttlocknum4 = /^\w{12}[vV]\d{2}[a-zA-Z]{2}\d[a-zA-Z]$/;				//&&&&&&&&&&&&v00aa0a
	var ttlocknum5 = /^\w{12}[vV]\d{2}[a-zA-Z]$/;							//&&&&&&&&&&&&v00a
	var ttlocknum6 = /^[a-zA-Z]{2}\d{7}[vV]\d{2}[a-zA-Z]$/;					//aa0000000v00a
	var ttlocknum7 = /^[a-zA-Z]{2}\d{6}[vV]\d{2}$/;							//aa000000v00
	var ttlocknum8 = /^\d\.\d{7}[vV]\d{2}[a-zA-Z]$/;						//0.0000000v00a
	var ttlocknum9 = /^[a-zA-Z]{2}\d{6}[vV]\d{2}[a-zA-Z]$/;					//aa000000v00a
	var ttlocknum10 = /^[a-zA-Z]{3}\d{4}[vV]\d{2}[a-zA-Z]$/;				//aaa0000v00a
	var ttlocknum11 = /^\d{12}[vV]\d{2}[a-zA-Z]$/;							//000000000000v00a
	var ttlocknum12 = /^\d{12}$/;											//000000000000*/
	
	var ttlocknum1 = /^[a-zA-Z]{2}\d{6}$/; 								//aa000000
	var ttlocknum2 = /^\d\*\d{7}$/;										//0.0000000
	var ttlocknum3 = /^\w{12}$/;										//&&&&&&&&&&&&
	var ttlocknum4 = /^[a-zA-Z]{2}\d{7}$/;								//aa0000000
	var ttlocknum5 = /^[a-zA-Z]{2}\d{6}$/;								//aa000000
	var ttlocknum6 = /^[a-zA-Z]{3}\d{4}$/;								//aaa0000
	var ttlocknum7 = /^\d{12}$/;										//000000000000	
	var ttlocknum8 = /^\d{8}\w{2}$/;									//00000000aa

	if (!ttlocknum1.test(tfld) && !ttlocknum2.test(tfld) && !ttlocknum3.test(tfld) 
		&& !ttlocknum4.test(tfld) && !ttlocknum5.test(tfld) && !ttlocknum6.test(tfld)
		&& !ttlocknum7.test(tfld) && !ttlocknum8.test(tfld)) {
    	msg (infofield, "error", "*");
    	setfocus(valfield);
    	return false;
  	}
	msg (infofield, "warn", "");
  	return true;
}

function validateZippc (valfield, infofield, required) {
	var stat = commonCheck (valfield, infofield, required);
	if (stat != proceed) return stat;
	
	var zippcfld = trim(valfield.value);
	var zippcfldlen = zippcfld.length;

	var zip = /^\d{5}$/;
	var pc = /^[a-zA-Z]{1}\d{1}[a-zA-Z]{1}\d{1}[a-zA-Z]{1}\d{1}$/;

//	if (!zipppcfldlen<5 && !zip.test(zippcfld)/* && !pc.test(zippcfld)*/) {
if (!zip.test(zippcfld) && !pc.test(zippcfld)) {
    	msg (infofield, "error", "*");
    	setfocus(valfield);
    	return false;
  	}	
	msg (infofield, "warn", "");
	return true;
}

// --------------------------------------------
//            validateRadio
// Validate Radio Buttons
// Returns true if so (and also if could not be executed because of old browser)
// --------------------------------------------

function validateRadio (valfield, infofield, required) {
	radioOption = -1;

	for (counter=0; counter<valfield.length; counter++) {
		if (valfield[counter].checked) radioOption = counter;
	}
	if (radioOption == -1) {
		msg (infofield, "error", "*");
		return false;
	}			
return true;
}

function validateChkbox (valfield, infofield, required) {
	if (valfield.checked == false) {
		msg (infofield, "error", "*");
		return false;
	}
	msg (infofield, "warn", "");
	return true;
}	

function validateDate (valfield, infofield, required) {
	var stat = commonCheck (valfield, infofield, required);
	if (stat != proceed) return stat;
	
	var datefield = trim(valfield.value);
	var date = /^\d{2}\/\d{2}\/\d{4}$/;

if (!date.test(datefield)) {
    	msg (infofield, "error", "*");
    	setfocus(valfield);
    	return false;
  	}	
	msg (infofield, "warn", "");
	return true;
}

function validateIP (valfield, infofield, required) {
	var stat = commonCheck (valfield, infofield, required);
	if (stat != proceed) return stat;
	
	var ipfld = trim(valfield.value);
	var ipAddy = /^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/;

	if (!ipAddy.test(ipfld)) {
    	msg (infofield, "error", "*");
    	setfocus(valfield);
    	return false;
  	}	
	msg (infofield, "warn", "");
	return true;
}

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

	var xUser = "steve";
	if (!xUser.test(valfield)){
		msg (infofield, "error", "*");
		setfocus(valfield);
		return false;
		}

  msg (infofield, "warn", "*");  
  return true;
}

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

	var xPassword = "steve";
	if (!xPassword.test(valfield)){
		msg (infofield, "error", "*");
		setfocus(valfield);
		return false;
		}

  msg (infofield, "warn", "*");  
  return true;
}