// JavaScript Document
// ----------------------------------------------------------------------
// 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  
//alert(elem.firstChild);
  if (emptyString.test(valfield.value)) {
    if (required) {
      msg (infofield, "normalTxtError", "Required");  
      setfocus(valfield);
			//alert("ERROR: required");
      return false;
    }
    else {
      msg (infofield, "normalTxtWarn", "");   // 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
{
  var stat = commonCheck (valfield, infofield, true);
  if (stat != proceed) return stat;

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

//---------------------------------------------
// Validate if something has been wrong keyword entered
// Returns true if so 

function validateKeys(valfield,   // element to be validated
                         infofield,actualValue ) // id of element to receive info/error msg
{
 // var stat = commonCheck (valfield, infofield, true);
 
	if(checkspecialcharacterforname(actualValue)==false)
	{
      msg (infofield, "normalTxtError", "Invalid character");
			setfocus(valfield);
		return false;
	}
 	else {
   msg (infofield, "normalTxtWarn", "");   // OK
    return true; 		
	}
// if (stat != proceed) return stat;

	
}
function checkspecialcharacterforname(str)
{
		
      var iChars = "!@#$%^&*()+=[]\\;/{}|\":<>?";
      for (var i = 0; i < str.length; i++)
      {
           if (iChars.indexOf(str.charAt(i)) != -1)
           {
						//msg (infofield, "normalTxtError", "ERROR: can not contain special character");
							 return false;
           }
      }
}

function isValidURL(url){
    var RegExp = /^(([\w]+:)?\/\/)?(([\d\w]|%[a-fA-f\d]{2,2})+(:([\d\w]|%[a-fA-f\d]{2,2})+)?@)?([\d\w][-\d\w]{0,253}[\d\w]\.)+[\w]{2,4}(:[\d]+)?(\/([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)*(\?(&?([-+_~.\d\w]|%[a-fA-f\d]{2,2})=?)*)?(#([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)?$/;
    if(RegExp.test(url)){
        return true;
    }else{
        return false;
    }
} 
//---------------------------------------------
// Validate Postcode
// Returns true if so 


function validatePostcode(valfield,   // element to be validated
                         infofield,actualValue ) // id of element to receive info/error msg
{
  var stat = commonCheck (valfield, infofield, true);
  if (stat != proceed) return stat;
	if(isNaN(actualValue))  	
	{
      msg (infofield, "normalTxtError", "Invalid postcode");
			setfocus(valfield);
		return false;
	
	}	

	if(checkspecialcharacterforname(actualValue)==false)
	{
      msg (infofield, "normalTxtError", "Invalid character");
			setfocus(valfield);
		return false;
	}
	if(actualValue < 200  || actualValue  > 9999)  	
	{
			//alert(actualValue);
      msg (infofield, "normalTxtError", "Invalid postcode");
			setfocus(valfield);
		return false;
	
	}	

	if(actualValue.length  < 3  || actualValue.length  > 4)  	
	{
      msg (infofield, "normalTxtError", "Invalid postcode");
			setfocus(valfield);
		return false;
	
	}	
	 	else {
   msg (infofield, "normalTxtWarn", "");   // 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, "normalTxtError", "Invalid e-mail address");

		//msg (infofield, "normalTxtError", "ERROR: not a valid e-mail address");
    setfocus(valfield);
    return false;
  }
	atPos = tfld.indexOf('@',0);
	if (atPos == -1)
	{
    msg (infofield, "normalTxtError", "Invalid e-mail address");
    //msg (infofield, "normalTxtError", "ERROR: Email address must contain an @.");
    setfocus(valfield);
    return false;
	}

	if (atPos == 0) 
	{
    msg (infofield, "normalTxtError", "Invalid e-mail address");

    //msg (infofield, "normalTxtError", "ERROR: Email address must not start with @.");
    setfocus(valfield);
    return false;
	}
	if (tfld.indexOf('@', atPos + 1) > - 1) 
	{
		msg (infofield, "normalTxtError", "Invalid e-mail address");
    //msg (infofield, "normalTxtError", "ERROR: Email address must contain only one @");
    setfocus(valfield);
    return false;
	}
	if (tfld.indexOf('.', atPos) == -1) 
	{
		msg (infofield, "normalTxtError", "Invalid e-mail address");
    //msg (infofield, "normalTxtError", "ERROR: Email address must contain a period in the domain name.");
    setfocus(valfield);
    return false;
	}


  if (tfld.indexOf('@.',0) != -1)
	{
		msg (infofield, "normalTxtError", "Invalid e-mail address");
    //msg (infofield, "normalTxtError", "ERROR: Period must not immediately follow @ in the email address.");
    setfocus(valfield);
    return false;
	}
  if (tfld.indexOf('.@',0) != -1)
	{
		msg (infofield, "normalTxtError", "Invalid e-mail address");
    //msg (infofield, "normalTxtError", "ERROR: Period must not immediately precede @ in the email address.");
    setfocus(valfield);
    return false;
	}
  if (tfld.indexOf('..',0) != -1)
	{
		msg (infofield, "normalTxtError", "Invalid e-mail address");
    //msg (infofield, "normalTxtError", "ERROR: Two periods must not be adjacent in the email address.");
    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, "normalTxtWarn", "");
		
  else
    msg (infofield, "normalTxtWarn", "");
  return true;
}

// --------------------------------------------
//             validateNumber
// Validate NumbersOnly
// Returns true if OK 
// --------------------------------------------

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

  var tfld = trim(valfield.value);
  var ageRE = /^[1-9]$/
 // if (!ageRE.test(tfld)) {
  if (isNaN(tfld)) {
    msg (infofield, "normalTxtError", "Invalid number");
    setfocus(valfield);
    return false;
  }

	if(nfield=="inf_postCardCvv")
	{
		if(tfld.length  < 3  )  		
		{
		//alert(tfld);	
		}
		
		if(tfld.length  < 3  || tfld.length  > 3)  	
		{
				
      msg (infofield, "normalTxtError", "Invalid number");
			setfocus(valfield);
			return false;
		}	
	}

	
	/*
  if (tfld>=200) {
    msg (infofield, "normalTxtError", "ERROR: not a valid age");
    setfocus(valfield);
    return false;
  }

  if (tfld>110) msg (infofield, "normalTxtWarn", "Older than 110: check correct");
  else {
    if (tfld<7) msg (infofield, "normalTxtWarn", "Bit young for this, aren't you?");
    else        msg (infofield, "normalTxtWarn", "");
  }
	*/
  return true;
}
// --------------------------------------------
//             validateUrl
// Validate website url
// Returns true if OK 
// --------------------------------------------

function validateUrl    (valfield,   // element to be validated
                         infofield,  // id of element to receive info/error msg
                         required)   // true if required
{
  
	
	 
  var tfld = trim(valfield.value);
   
	
	 if(!isValidURL(tfld))
	 {
    msg (infofield, "normalTxtError", "Invalid website address");
    setfocus(valfield);
    return false;
	}
	 
  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, "normalTxtError", "ERROR: not a valid telephone number. Characters permitted are digits, space ()- and leading +");
    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, "normalTxtError", "ERROR: " + numdigits + " digits - too short");
    setfocus(valfield);
    return false;
  }

  if (numdigits>14)
    msg (infofield, "normalTxtWarn", numdigits + " digits - check if correct");
  else { 
    if (numdigits<10)
      msg (infofield, "normalTxtWarn", "Only " + numdigits + " digits - check if correct");
    else
      msg (infofield, "normalTxtWarn", "");
  }
  return true;
}

// --------------------------------------------
//             validateAge
// Validate person's age
// Returns true if OK 
// --------------------------------------------

function validateAge    (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 ageRE = /^[0-9]{1,3}$/
  if (!ageRE.test(tfld)) {
    msg (infofield, "normalTxtError", "ERROR: not a valid age");
    setfocus(valfield);
    return false;
  }

  if (tfld>=200) {
    msg (infofield, "normalTxtError", "ERROR: not a valid age");
    setfocus(valfield);
    return false;
  }

  if (tfld>110) msg (infofield, "normalTxtWarn", "Older than 110: check correct");
  else {
    if (tfld<7) msg (infofield, "normalTxtWarn", "Bit young for this, aren't you?");
    else        msg (infofield, "normalTxtWarn", "");
  }
  return true;
}