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


// 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", "ERROR: required");  


      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 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, "warn", "");  


  return true;


}


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


//            validatePresent1


// Validate if something has been entered


// Returns true if so 


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





function validatePresent1(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;


}





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


//            validateAddress


// Validate if something has been entered


// Returns true if so 


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





function validateAddress(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;


}





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


//            validateCity


// Validate if something has been entered


// Returns true if so 


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





function validateCity(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;


}





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


//            validatePcode


// Validate if something has been entered


// Returns true if so 


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





function validatePcode(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;


}





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


//            validateState


// Validate if something has been entered


// Returns true if so 


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





function validateState(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;


}





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


//            validateCountry


// Validate if something has been entered


// Returns true if so 


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





function validateCountry(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;


}





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


//            validateCompname


// Validate if something has been entered


// Returns true if so 


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





function validateCompname(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", "ERROR: not a valid e-mail 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, "warn", "Unusual e-mail address - check if correct");


  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", "ERROR: not a valid. digits, space ()- and leading + are permitted");


    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: " + numdigits + " digits - too short");


    setfocus(valfield);


    return false;


  }





  if (numdigits>14)


    msg (infofield, "warn", numdigits + " digits - check if correct");


  else { 


    if (numdigits<10)


      msg (infofield, "warn", "Only " + numdigits + " digits - check if correct");


    else


      msg (infofield, "warn", "");


  }


  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, "error", "ERROR: not a valid age");


    setfocus(valfield);


    return false;


  }





  if (tfld>=200) {


    msg (infofield, "error", "ERROR: not a valid age");


    setfocus(valfield);


    return false;


  }





  if (tfld>110) msg (infofield, "warn", "Older than 110: check correct");


  else {


    if (tfld<7) msg (infofield, "warn", "Bit young for this, aren't you?");


    else        msg (infofield, "warn", "");


  }


  return true;


}

<!-- Validate Selection -->

function validateAboutUs(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;

}

<!-- Refresh Captcha -->
function changeCaptcha()
{
ran = Math.floor(Math.random()*10000);
document.getElementById('captcha').src = 'captcha2.php?rand='+ran;
}