// General-purpose routines are below.
  function validateOnSubmit() {
    var elem;
    var errs=0;
    // execute all element validations in reverse order, so focus gets
    // set to the first one in error.
    
    	if (!validateAccept  (document.register.acceptterms, 'acceptError', false)) errs += 1; 
    	//if (!validateRead    (document.register.readterms,   'readError',  false)) errs += 1;
	


    if (errs>1)  alert('There are fields which need correction before sending');
    if (errs==1) alert('There is a field which needs correction before sending');

    //return (errs==0);
    return false;
  };

function checkscript() {
	var elem;
    var errs=0;
    var email_test=false;
    var user_test=false;
    var pass_test=false;
   validateEmail (document.register.email, 'emailError', true);
   validateName(document.register.user,  'userError', true);
   validatePass(document.register.pass,  'passError', true);
    var elemEmail = document.getElementById('emailError');
   if (elemEmail.firstChild.nodeValue.length != 0) {
   		errs = errs+ 1;
	}
   elemEmail = document.getElementById('userError');
  	if (elemEmail.firstChild.nodeValue.length != 0) {
   		errs = errs+ 1;
	}
	   elemEmail = document.getElementById('passError');
  	if (elemEmail.firstChild.nodeValue.length != 0) {
   		errs = errs+ 1;
	}
	if (errs==1) {
		alert ("One error. Please correct before sending.");
		return false;
	} else if (errs>1) {
		alert (errs + " errors. Please correct before sending.");
		return false;
	} else {
		return true;
	}
}
// ----------------------------------------------------------------------
// 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, "errorShow", "ERROR: required");  
      setfocus(valfield);
      return false;
    }
    else {
      msg (infofield, "warn", "");   // OK
      return true;  
    }
  }
  return proceed;
}



function validateRead(valfield,infofield, required ) {

	if (!document.register.readterms.checkbox.checked) {
		msg (infofield, "error", "ERROR: You must read the terms to register");
	    setfocus(valfield);
	    return false;
	} 
  return true;
}

function validateAccept(valfield,infofield, required ) {
  var stat = commonCheck (valfield, infofield, true);
  if (stat != proceed) return stat;
 
	if (!document.register.acceptterms.checked) {
		msg (infofield, "error", "ERROR: You must accept terms to register");
	    setfocus(valfield);
	    return false;
	} 
	msg (infofield, "errorHide", "")
  	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, "errorShow", "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, "errorShow", "Unusual e-mail address - check if correct");
  else
    msg (infofield, "errorHide", "");
  return true;
}



// --------------------------------------------
// Validate Username
// Returns true if OK 
// --------------------------------------------

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

  var tfld = trim(valfield.value);
  var ageRE = /^([0-9a-zA-Z])+$/
    if (tfld.length<5) {
    	msg (infofield, "errorShow", "ERROR: Username must be at least 5 characters long.");
    	setfocus(valfield);
    	return false;
  }
  
  if (!ageRE.test(tfld)) {
    msg (infofield, "errorShow", "ERROR: Username must be all letters and/or numbers");
    setfocus(valfield);
    return false;
  }

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

// --------------------------------------------
// Validate Password
// Returns true if OK 
// --------------------------------------------

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

  var tfld = trim(valfield.value);
  var ageRE = /^([0-9a-zA-Z])+$/
    if (tfld.length<5) {
    	msg (infofield, "errorShow", "ERROR: Password must be at least 5 characters long.");
    	setfocus(valfield);
    	return false;
  }
   if (!ageRE.test(tfld)) {
    msg (infofield, "errorShow", "ERROR: Password must be all letters and/or numbers");
    setfocus(valfield);
    return false;
  }

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