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(vfld)
{
  glb_vfld.focus()
}

function setfocus(vfld)
{
  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", "Required");  
      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 PresentVal(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 EmailVal  (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", "Unusual e-mail");
  else
    msg (ifld, "warn", "");
  return true;
};

// -----------------------------------------
//               ConfirmEmailVal
// Validate if e-mail address
// Returns true if so (and also if could not be executed because of old browser)
// -----------------------------------------

function ConfirmEmailVal  (the_element,   // element to be validated
						   original_id,  // element to check against
                         message_id)   // id of element to receive info/error msg
                        
{
  var stat = commonCheck (the_element, message_id, true);
  if (stat != proceed) return stat;
  
  var orig = document.getElementById(original_id);
  
  if (emptyString.test(orig.value))
  {
	return true;
  }

  var trim_element = trim(the_element.value);  // value of field with whitespace trimmed off
  if( trim_element != trim( orig.value ) )
	{
		msg( message_id, "error", "Mismatch" );
		return false;
	}
	else
	{
		msg( message_id, "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 PhoneVal  (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)) 
  {
	if( reqd )
	{
    msg (ifld, "error", "Invalid Character");
	}
	else
	{
		msg( ifld, "warn", "Invalid Character" );
	}
    setfocus(vfld);
    return !reqd;
  }

  var numdigits = 0;
  for (var j=0; j<tfld.length; j++)
    if (tfld.charAt(j)>='0' && tfld.charAt(j)<='9') numdigits++;

  if (numdigits<6) 
  {
	if( reqd )
	{
    msg (ifld, "error", "Too Short");
	}
	else
	{
		msg( ifld, "warn", "Too Short" );
	}
    setfocus(vfld);
    return !reqd;
  }

  if (numdigits>14)
    msg (ifld, "warn", numdigits + " digits - check if correct");
  else { 
    if (numdigits<10)
      msg (ifld, "warn", "Correct?");
    else
      msg (ifld, "warn", "");
  }
  return true;
};

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

function AgeVal    (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);
  var ageRE = /^[0-9]{1,3}$/
  if (!ageRE.test(tfld)) {
    msg (ifld, "error", "ERROR: not a valid age");
    setfocus(vfld);
    return false;
  }

  if (tfld>=200) {
    msg (ifld, "error", "ERROR: not a valid age");
    setfocus(vfld);
    return false;
  }

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

// -----------------------------------------
//            SelectOneVal
// Validate if something has been selected
// Returns true if so 
// -----------------------------------------

function SelectOneVal(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);
  if( tfld == "Select One" )
  {
  	msg (ifld, "error", "Please Select One");  
	return false;
  }
 
  msg (ifld, "warn", "");  
  return true;
};

function CheckReFi( the_element, // element to check value of 
				   row_id )  // row to place html
{
	//var stat = commonCheck( the_element, row_id, false );
	//if( stat != proceed) return stat;
	
	
	
	//var elem = document.getElementById(row_id);
	var val = 'none';
	
	if( the_element.value == "Residential Refinance with cash-out" ||
	   the_element.value == "Residential Refinance with no cash-out" || 
	   the_element.value == "Commercial Refinance with cash-out" || 
	   the_element.value == "Commercial Refinance with no cash-out" )
	{
		val = 'block';	
	}
	
	if (document.getElementById) { // DOM3 = IE5, NS6
		var elem = document.getElementById(row_id);
		elem.style.display = val;
	} else { 
		if (document.layers) {	
			document.row_id.display = val;
		} else {
			document.all.row_id.style.display = val;
		}
	}
	
	//msg( row_id, "error", "" );
	//elem.style.display = 'none';
	return true;
}

function CheckRefer( the_element, // element to check value of 
				   row_id )  // row to place html
{
	//var stat = commonCheck( the_element, '_loantype', false );
	//if( stat != proceed) return stat;
	
	//var elem = document.getElementById(row_id);
	var val = 'none';
	
	if( the_element.value == "referral" ||
	   the_element.value == "Other" )
	{
		val = 'block';	
		
		//return true;
	}
	
	//elem.style.display = val;
	
	
	if (document.getElementById) { // DOM3 = IE5, NS6
		var elem = document.getElementById(row_id);
		elem.style.display = val;
	} else { 
		if (document.layers) {	
			document.row_id.display = val;
		} else {
			document.all.row_id.style.display = val;
		}
	}
	
	//elem.style.display = 'none';
	return true;
}