var nbsp = 160;    // non-breaking space char
var node_text = 3; // DOM text node-type
var emptyString = /^\s*$/
var glb_vfld;      // retain vfld 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()
{
  glb_vfld.focus()
}

function setfocus(vfld)
{
  // save vfld in global variable so value retained when routine exits
  glb_vfld = vfld;
  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.style.color = "Red";
	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    (vfld,// element to be validated
                         ifld,   // id of element to receive info/error msg
                         reqd)   // true if required
{
  if (!document.getElementById)
    return true;  // not available on this browser - leave validation to the server
  var elem = document.getElementById(ifld);

if (!elem.firstChild)
    return true;  // not available on this browser 
  if (elem.firstChild.nodeType != node_text)
    return true;  // ifld is wrong type of node 

  if (emptyString.test(vfld.value)) {
    if (reqd) {
      msg (ifld, "error", "Required");
      setfocus(vfld);
      return false;
    }
    else {
      msg (ifld, "warn", "");   // OK
      return true;  
    }
  }
  return proceed;
}
// -----------------------------------------
//            validateFirstName
// Validate if something has been entered
// Returns true if so 
// -----------------------------------------

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

  msg (ifld, "warn", "");
  return true;
};

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

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

  msg (ifld, "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  (vfld,   // element to be validated
                         ifld,   // id of element to receive info/error msg
                         reqd)   // true if required
{
  var stat = commonCheck (vfld, ifld, reqd);
  if (stat != proceed) return stat;

  var tfld = trim(vfld.value);  // value of field with whitespace trimmed off
  var email = /^[^@]+@[^@.]+\.[^@]*\w\w$/
  if (!email.test(tfld)) {
    msg (ifld, "error", "Invalid ");
    setfocus(vfld);
    return false;
  }

  var email2 = /^[A-Za-z][\w.-]+@\w[\w.-]+\.[\w.-]*[A-Za-z][A-Za-z]$/
  if (!email2.test(tfld)) 
    msg (ifld, "warn", "not valid e-mail address");
  else
    msg (ifld, "warn", "");
  return true;
};

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

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

  msg (ifld, "warn", "");  
  return true;
};


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

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

  msg (ifld, "warn", "");  
  return true;
};


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

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

  msg (ifld, "warn", "");  
  return true;
};

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

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

  msg (ifld, "warn", "");  
  return true;
};

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

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

  msg (ifld, "warn", "");  
  return true;
};

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

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

  var tfld = trim(vfld.value);  // value of field with whitespace trimmed off
  var zipcode = /^\+?[0-9 ()-]+[0-9]$/
  if (!zipcode.test(tfld)) {
    msg (ifld, "error", "Invalid");
    setfocus(vfld);
    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>5 || numdigits < 5) {
    msg (ifld, "error", "Invalid");
    setfocus(vfld);
    return false;
  }
	 msg (ifld, "warn", "");  
  return true;
};


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

function validatePhone  (vfld,   // element to be validated
                         ifld,   // id of element to receive info/error msg
                         reqd)   // true if required
{
  var stat = commonCheck (vfld, ifld, reqd);
  if (stat != proceed) return stat;

  var tfld = trim(vfld.value);  // value of field with whitespace trimmed off
  var telnr = /^\+?[0-9 ()-]+[0-9]$/
  if (!telnr.test(tfld)) {
    msg (ifld, "error", "Invalid");
    setfocus(vfld);
    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 (ifld, "error", "Invalid");
		setfocus(vfld);
    return false;
  }

  if (numdigits>20)
    msg (ifld, "warn", "Invalid");
  else { 
    if (numdigits<10)
      msg (ifld, "warn", "Invalid");
    else
      msg (ifld, "warn", "");
  }
  return true;
};
// -----------------------------------------
//            validateFax
// Validate if something has been entered
// Returns true if so 
// -----------------------------------------

function validateFax  (vfld,   // element to be validated
                         ifld,   // id of element to receive info/error msg
                         reqd)   // true if required
{
  var stat = commonCheck (vfld, ifld, reqd);
  if (stat != proceed) return stat;

  var tfld = trim(vfld.value);  // value of field with whitespace trimmed off
  var telnr = /^\+?[0-9 ()-]+[0-9]$/
  if (!telnr.test(tfld)) {
    msg (ifld, "error", "Invalid");
    setfocus(vfld);
    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 (ifld, "error", "Invalid");
    setfocus(vfld);
    return false;
  }

  if (numdigits>14)
    msg (ifld, "warn", "Invalid");
  else { 
    if (numdigits<10)
      msg (ifld, "warn", "Invalid");
    else
      msg (ifld, "warn", "");
  }
  return true;
};
// -----------------------------------------
//            validateNumEmployee
// Validate if something has been entered
// Returns true if so 
// -----------------------------------------

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

  msg (ifld, "warn", "");
  return true;
};