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

// 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 Aug 2004: have tested that IE 5.0 and IE 5.5 both support DOM model

// sufficiently well, so innerHTML option removed (redundant).

//

// 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

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



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.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", "");  

      setfocus(vfld);

      return false;

    }

    else {

      msg (ifld, "warn", "");   // OK

      return true;  

    }

  }

  return proceed;

}



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

//            validatePresent

// Validate if something has been entered

// Returns true if so 

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



function validatePresent(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", "");

    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", "");

  else

    msg (ifld, "warn", "");

  return true;

};



// validate the Date Of Birth //



function daysOfMonth(month, year)

{

	daysInMonth = {"1":"31", "2":"28", "3":"31", "4":"30", "5":"31", "6":"30", "7":"31", "8":"31", "9":"30", "10":"31", "11":"30", "12":"31"};



	if( ( (year%4) == 0) && (month == 2) )

		return 29;

	else 

		return daysInMonth[month];

}



function validateDate  (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;



	// trim white spaces

  var tfld = trim(vfld.value);

  

  // check for format

  var dobRE = /^[0-9]{2}(-)[0-9]{2}(-)[0-9]{4}$/

  if (!dobRE.test(tfld)) {

    msg (ifld, "error", "");

    setfocus(vfld);

    return false;

  }

  

  // checks for valid date

  var date = tfld.split("-");

  var month = date[0];

  var day = date[1];

  var year = date[2];

  

//  window.alert(" Month = " + month + " Date = " + day + " Year =" + year);

 

  // check if the given day and month in the valid range

  if(month <1 || month >12)

   {

   	msg(ifld,"error","");

	setfocus(vfld);

    return false;

   }

   else

   {

 		if( day > daysOfMonth (month,year) ){

			msg(ifld,"");

			setfocus(vfld);

		    return false;

		}	

   	}

  msg(ifld,"error","");

  return true;

};



//validateSSN



function validateSSN  (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;



	// trim white spaces

  var tfld = trim(vfld.value);

  

  // check for format

  var ssnRE = /^[0-9]{3}(-)*[0-9]{2}(-)*[0-9]{4}$/

  if (!ssnRE.test(tfld)) {

    msg (ifld, "error", "");

    setfocus(vfld);

    return false;

  }

  msg(ifld,"error","");

  return true;

};



function validatePhone  (vfld,   // element to be validated

                         ifld,   // id of element to receive info/error msg

                         reqd)   // true if required

{

//  window.alert(reqd);

  var stat = commonCheck (vfld, ifld, reqd);

  if (stat != proceed) return stat;



	// trim white spaces

  var tfld = trim(vfld.value);

  

  // check for format

  var ppRE = /^[0-9]{3}(-)*[0-9]{3}(-)*[0-9]{4}$/

  if (!ppRE.test(tfld)) {

    msg (ifld, "error", "");

    setfocus(vfld);

    return false;

  }

  msg(ifld,"error","");

  return true;

};





// validate Driver Licence format

function validateDL  (vfld,   // element to be validated

                       ifld,   // id of element to receive info/error msg

                       reqd)   // true if required

{

//  window.alert(reqd);

  var stat = commonCheck (vfld, ifld, reqd);

  if (stat != proceed) return stat;



	// trim white spaces

  var tfld = trim(vfld.value);

  

  // check for format

  var ppRE = /^[0-9]{8}$/

  if (!ppRE.test(tfld)) {

    msg (ifld, "error", "");

    setfocus(vfld);

    return false;

  }

  msg(ifld,"error","");

  return true;

};



// JavaScript Document



// continue from formval.js and formval2.js





// validate Zip code format

function validateZip  (vfld,   // element to be validated

                       ifld,   // id of element to receive info/error msg

                       reqd)   // true if required

{

//  window.alert(reqd);

  var stat = commonCheck (vfld, ifld, reqd);

  if (stat != proceed) return stat;



	// trim white spaces

  var tfld = trim(vfld.value);

  

  // check for format

  var ppRE = /^[0-9]{5}$/

  if (!ppRE.test(tfld)) {

    msg (ifld, "error", "");

    setfocus(vfld);

    return false;

  }

  msg(ifld,"error","");

  return true;

};



// validate Zip code format

function validate_CC  (vfld,   // element to be validated

                      ifld,   // id of element to receive info/error msg

                      reqd)   // true if required

{

//  window.alert(reqd);

  var stat = commonCheck (vfld, ifld, reqd);

  if (stat != proceed) return stat;



	// trim white spaces

  var tfld = trim(vfld.value);

  

  // check for format

  var ppRE = /^[0-9]{4}(\.)[0-9]{4}(\.)[0-9]{4}(\.)[0-9]{4}$/

  if (!ppRE.test(tfld)) {

    msg (ifld, "error", "");

    setfocus(vfld);

    return false;

  }

  msg(ifld,"error","");

  return true;

};



function validate_Exp (vfld,   // element to be validated

                      ifld,   // id of element to receive info/error msg

                      reqd)   // true if required

{

//  window.alert(reqd);

  var stat = commonCheck (vfld, ifld, reqd);

  if (stat != proceed) return stat;



	// trim white spaces

  var tfld = trim(vfld.value);

  

  // check for format

  var ExpRE = /^[0-9]{2}(-)[0-9]{2}$/

  if (!ExpRE.test(tfld)) {

    msg (ifld, "error", "");

    setfocus(vfld);

    return false;

  }

  else

  {

  	var date = tfld.split("-");

	mm = date[0];

	if(mm < 1 || mm > 12)

	{

		msg (ifld, "error", "");

	    setfocus(vfld);

    	return false;

	}

  }

  msg(ifld,"error","");

  return true;

};


function validateString (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;

	// trim white spaces

  var tfld = trim(vfld.value);

  // check for format

  var strRE = /^([A-Za-z]|[ ])+$/

  if (!strRE.test(tfld)) {

    msg (ifld, "error", "");
    setfocus(vfld);
    return false;
  }

  msg(ifld,"error","");
  return true;

};

function validateAddress(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;
 	// trim white spaces
  
  var tfld = trim(vfld.value);

  // check for format

  var addRE = /^([A-Za-z0-9]|[_]|[-]|[,]|[\/]|[ ])*$/

  if (!addRE.test(tfld)) {

    msg (ifld, "error", "");
    setfocus(vfld);
    return false;
  }

  msg(ifld,"error","");
  return true;

};

function validateAccNo(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;
 	// trim white spaces
  
  var tfld = trim(vfld.value);

  // check for format

  var addRE = /^[A-Za-z0-9]*$/

  if (!addRE.test(tfld)) {

    msg (ifld, "error", "");
    setfocus(vfld);
    return false;
  }

  msg(ifld,"error","");
  return true;

};

function validateAmount(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;
 	// trim white spaces
  
  var tfld = trim(vfld.value);

  // check for format

  var addRE = /^[0-9]+(.)[0-9]*$/

  if (!addRE.test(tfld)) {

    msg (ifld, "error", "");
    setfocus(vfld);
    return false;
  }

  msg(ifld,"error","");
  return true;

};

function validateNumber(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;
 	// trim white spaces
  
  var tfld = trim(vfld.value);

  // check for format

  var addRE = /^[0-9]*$/

  if (!addRE.test(tfld)) {

    msg (ifld, "error", "");
    setfocus(vfld);
    return false;
  }

  msg(ifld,"error","");
  return true;

};