// -------------------------------------------------------------
// Copyright (c) 2006 Codejock Software, All Rights Reserved.
// url: http://www.codejock.com
// -------------------------------------------------------------

// toggleCode - toggles display block of code
function toggleCode(display1, hide1, hide2) {
  if (document.layers) {
    document.layers[display1].display = 'block';
    document.layers['opt' + display1].style.fontWeight = 'bold';
    document.layers[hide1].display = 'none';
    document.layers['opt' + hide1].style.fontWeight = 'normal'; 
    if (document.all[hide2]) {
    	document.layers[hide2].display = 'none';
    	document.layers['opt' + hide2].style.fontWeight = 'normal'; 
    }
  }
  else if (document.all) {
    document.all[display1].style.display = 'block';
    document.all['opt' + display1].style.fontWeight = 'bold';
    document.all[hide1].style.display = 'none';
    document.all['opt' + hide1].style.fontWeight = 'normal'; 
    if (document.all[hide2]) {
    	document.all[hide2].style.display = 'none';    
    	document.all['opt' + hide2].style.fontWeight = 'normal'; 
    }
  }
  else if (document.getElementById) {
    document.getElementById(display1).style.display = 'block';
    document.getElementById('opt' + display1).style.fontWeight = 'bold';
    document.getElementById(hide1).style.display = 'none';
	document.getElementById('opt' + hide1).style.fontWeight = 'normal';   
	if (document.getElementById(hide2)) { 
    	document.getElementById(hide2).style.display = 'none';
		document.getElementById('opt' + hide2).style.fontWeight = 'normal';    
	}
  }
}

function Truncate(form)
{
	if (form.value.length > 65535) {
		form.value=(form.value.substr(0,65535));
	}
}

  // ----------------------------------------------------------------------
  // 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", "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 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;
  };
  
  // -----------------------------------------
  //            validatePresentField
  // Validate if something has been entered
  // Returns true if so 
  // -----------------------------------------
  
  function validatePresentField(vfld, ifld, sfld, bSelect)
  {
    var stat = commonCheck (vfld, ifld, true);
    if (stat != proceed)
    {
        if (bSelect)
            msg (ifld, "error", "Please select a '" + sfld + "'.");
        else
            msg (ifld, "error", "'" + sfld + "' cannot be left blank.");
        return stat;
    }
  
    msg (ifld, "warn", "");  
    return true;
  }
  
  // -----------------------------------------
  //            validatePasswords
  // Validate if password fields match.
  // -----------------------------------------
  
  function validatePasswords(vfld1,   // element to be validated
                             vfld2,   // element to be validated
                             ifld )  // id of element to receive info/error msg
  {
    if (vfld1.value != vfld2.value)
    {
        msg (ifld, "error", "Passwords do not match");  
        setfocus(vfld2);
        return false;
    }

    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) {
        msg (ifld, "error", "'Email' cannot be left blank.");  
        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", "Not a valid e-mail address");
      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 address - check if correct");
    else
      msg (ifld, "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  (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", "ERROR: not a valid telephone number. Characters permitted are digits, space ()- and leading +");
      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", "ERROR: " + numdigits + " digits - too short");
      setfocus(vfld);
      return false;
    }
  
    if (numdigits>14)
      msg (ifld, "warn", numdigits + " digits - check if correct");
    else { 
      if (numdigits<10)
        msg (ifld, "warn", "Only " + numdigits + " digits - check if correct");
      else
        msg (ifld, "warn", "");
    }
    return true;
  };
  
  // -----------------------------------------
  //             validateAge
  // Validate person's age
  // Returns true if OK 
  // -----------------------------------------
  
  function validateAge    (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;
  };