/**
* browser-safe functie om een eventhandler aan een element te koppelen
*
* voorbeeld van gebruik: addEvent(window, 'load', showPopup, false);
*/
function addEvent(elm, evType, fn, useCapture){
  if(elm.addEventListener){
    elm.addEventListener(evType, fn, useCapture);
    return true;
  } else if(elm.attachEvent){
    var r = elm.attachEvent('on' + evType, fn);
    return r;
  } else {
    elm['on'+evType] = fn;
  }
}
/**
* postcode check
* let op: de postcode moet al in upcase staan
* vóór de aanroep van deze functie dus zoiets
*   form.nieuwePostcode.value = form.nieuwePostcode.value.toUpperCase();
*/
function checkPostcode(postc) {
  if(postc != ''){
    re = /^(\d\d\d\d) *([A-Z][A-Z])$/;
    if (!postc.match(re)) {
      return false;
    } else {
      return true;
    }
  }
}

function checkEmail(email){
  if(email != ''){
    var re = /^[a-z0-9\-\.\_]+@([a-z0-9\-]+\.)+[a-z]{2,4}$/i;
    if(!email.match(re)) {
      return false;
    } else {
      return true;
    }
  }
}

function checkTelefoon(telnr){
  if(telnr != ''){
    re = /^\d{10}$/;
    if(!telnr.match(re)) {
      return false;
    } else {
      return true;
    }
  }
}

function isInArray(array, value) {
  var inArray = false;

  for(i=0; i<array.length && !inArray; i++)
    if(array[i] == value) inArray = true;

  return inArray;
}

// zorgt dat het element op de pagina dat id='focusid'
// heeft de focus krijgt na laden van de pagina
function receiveFocus(){
  var fElem = $("focusid");
  if(fElem!=null){fElem.focus();}
}

/**
* Deze functie bepaalt de breedte van het client scherm en
* zet overeenkomstig de juiste CSS in
* 
* MS 10-06-07: namen CSS aangepast aan scherm formaat. Er is 
*              nu een algemene CSS waar schermonafhankelijke 
*              opmaak in staat. Tevens een bandbreedte aangegeven
*              waartussen de client-breedte zich bevind. Het is 
*              zelden precies 1280 oid. (in mijn geval test: 1277)
*              @param String cssLocation: dir waar de CSS-en staan
*/
function checkScreen(cssLocation){
  cssLocation += "/";
  clientWidth = screen.availWidth;  
  // bandbreedte van 10px eromheen
  clientWidth = ((clientWidth > 790)&&(clientWidth < 810))?800:clientWidth;
  clientWidth = ((clientWidth > 1014)&&(clientWidth < 1034))?1024:clientWidth;
  clientWidth = ((clientWidth > 1270)&&(clientWidth < 1290))?1280:clientWidth;

  switch(clientWidth){  
    case 1024:
      // gebruik de CSS voor een 1024 scherm
      $("cssLink").href = cssLocation + "obo1024.css";
      break;
    case 1280:
      // gebruik de CSS voor een 1280 scherm
      $("cssLink").href = cssLocation + "obo1280.css";
      break;
   case 800:
     // gebruik de CSS voor een 800 scherm
     $("cssLink").href = cssLocation + "obo800.css";
     break;
   default:
      $("cssLink").href = cssLocation + "obo1024.css";
      break;
   }
}

/**
* Vervangt de veel voorkomende document.getElementById door $
*/
function $(id) { return document.getElementById(id); }

/**
* detect the target elem of the event ev, works for FF and IE
*/
function getTargetElement(ev) {
  var e = window.event?window.event:ev;
  var t = e.target?e.target:e.srcElement;
  return t;
}

var d = new Date();
window.defaultStatus="Copyright © 2004 - "+d.getFullYear()+" ScolaVisa VOF - Amsterdam: http://www.scolavisa.eu";
addEvent(window, 'load', receiveFocus, false);

// Ultimate client-side JavaScript client sniff. Version 3.03
// (C) Netscape Communications 1999-2001.  Permission granted to reuse and distribute.
// Revised 17 May 99 to add is_nav5up and is_ie5up (see below).
// Revised 20 Dec 00 to add is_gecko and change is_nav5up to is_nav6up
//                      also added support for IE5.5 Opera4&5 HotJava3 AOLTV
// Revised 22 Feb 01 to correct Javascript Detection for IE 5.x, Opera 4, 
//                      correct Opera 5 detection
//                      add support for winME and win2k
//                      synch with browser-type-oo.js
// Revised 26 Mar 01 to correct Opera detection
// Revised 02 Oct 01 to add IE6 detection
// Revised 17 dec 07 to detect Safari 3.03 for windows (used to be detected as navigator)
//                      by ScolaVisa (c) / MS 

// Everything you always wanted to know about your JavaScript client
// but were afraid to ask. Creates "is_" variables indicating:
// (1) browser vendor:
//     is_nav, is_ie, is_opera, is_hotjava, is_webtv, is_TVNavigator, is_AOLTV
// (2) browser version number:
//     is_major (integer indicating major version number: 2, 3, 4 ...)
//     is_minor (float   indicating full  version number: 2.02, 3.01, 4.04 ...)
// (3) browser vendor AND major version number
//     is_nav2, is_nav3, is_nav4, is_nav4up, is_nav6, is_nav6up, is_gecko, is_ie3,
//     is_ie4, is_ie4up, is_ie5, is_ie5up, is_ie5_5, is_ie5_5up, is_ie6, is_ie6up, is_hotjava3, is_hotjava3up,
//     is_opera2, is_opera3, is_opera4, is_opera5, is_opera5up
// (4) JavaScript version number:
//     is_js (float indicating full JavaScript version number: 1, 1.1, 1.2 ...)
//
// See http://www.it97.de/JavaScript/JS_tutorial/bstat/navobj.html and
// http://www.it97.de/JavaScript/JS_tutorial/bstat/Browseraol.html
// for detailed lists of userAgent strings.
//
// Note: you don't want your Nav4 or IE4 code to "turn off" or
// stop working when new versions of browsers are released, so
// in conditional code forks, use is_ie5up ("IE 5.0 or greater") 
// is_opera5up ("Opera 5.0 or greater") instead of is_ie5 or is_opera5
// to check version in code which you want to work on future
// versions.

// convert all characters to lowercase to simplify testing
var agt=navigator.userAgent.toLowerCase();

// *** BROWSER VERSION ***
// Note: On IE5, these return 4, so use is_ie5up to detect IE5.
var is_major = parseInt(navigator.appVersion);
var is_minor = parseFloat(navigator.appVersion);

// Note: Opera and WebTV spoof Navigator.  We do strict client detection.
// If you want to allow spoofing, take out the tests for opera and webtv.
var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
            && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1)
            && (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1)
            && (agt.indexOf("safari") == -1));
var is_nav2 = (is_nav && (is_major == 2));
var is_nav3 = (is_nav && (is_major == 3));
var is_nav4 = (is_nav && (is_major == 4));
var is_nav4up = (is_nav && (is_major >= 4));
var is_navonly      = (is_nav && ((agt.indexOf(";nav") != -1) ||
                      (agt.indexOf("; nav") != -1)) );
var is_nav6   = (is_nav && (is_major == 5));
var is_nav6up = (is_nav && (is_major >= 5));
var is_gecko  = (agt.indexOf('gecko') != -1);

var is_saf    = ((agt.indexOf("safari")!=-1) && (agt.indexOf("firefox")==-1));

var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
var is_ie3    = (is_ie && (is_major < 4));
var is_ie4    = (is_ie && (is_major == 4) && (agt.indexOf("msie 4")!=-1) );
var is_ie4up  = (is_ie && (is_major >= 4));
var is_ie5    = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")!=-1) );
var is_ie5_5  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.5") !=-1));
var is_ie5up  = (is_ie && !is_ie3 && !is_ie4);
var is_ie5_5up =(is_ie && !is_ie3 && !is_ie4 && !is_ie5);
var is_ie6    = (is_ie && (is_major == 4) && (agt.indexOf("msie 6.")!=-1) );
var is_ie6up  = (is_ie && !is_ie3 && !is_ie4 && !is_ie5 && !is_ie5_5);

// KNOWN BUG: On AOL4, returns false if IE3 is embedded browser
// or if this is the first browser window opened.  Thus the
// variables is_aol, is_aol3, and is_aol4 aren't 100% reliable.
var is_aol   = (agt.indexOf("aol") != -1);
var is_aol3  = (is_aol && is_ie3);
var is_aol4  = (is_aol && is_ie4);
var is_aol5  = (agt.indexOf("aol 5") != -1);
var is_aol6  = (agt.indexOf("aol 6") != -1);

var is_opera = (agt.indexOf("opera") != -1);
var is_opera2 = (agt.indexOf("opera 2") != -1 || agt.indexOf("opera/2") != -1);
var is_opera3 = (agt.indexOf("opera 3") != -1 || agt.indexOf("opera/3") != -1);
var is_opera4 = (agt.indexOf("opera 4") != -1 || agt.indexOf("opera/4") != -1);
var is_opera5 = (agt.indexOf("opera 5") != -1 || agt.indexOf("opera/5") != -1);
var is_opera5up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4);

var is_webtv = (agt.indexOf("webtv") != -1); 

var is_TVNavigator = ((agt.indexOf("navio") != -1) || (agt.indexOf("navio_aoltv") != -1)); 
var is_AOLTV = is_TVNavigator;

var is_hotjava = (agt.indexOf("hotjava") != -1);
var is_hotjava3 = (is_hotjava && (is_major == 3));
var is_hotjava3up = (is_hotjava && (is_major >= 3));

// *** JAVASCRIPT VERSION CHECK ***
var is_js;
if (is_nav2 || is_ie3) is_js = 1.0;
else if (is_nav3) is_js = 1.1;
else if (is_opera5up) is_js = 1.3;
else if (is_opera) is_js = 1.1;
else if ((is_nav4 && (is_minor <= 4.05)) || is_ie4) is_js = 1.2;
else if ((is_nav4 && (is_minor > 4.05)) || is_ie5) is_js = 1.3;
else if (is_hotjava3up) is_js = 1.4;
else if (is_nav6 || is_gecko) is_js = 1.5;
// NOTE: In the future, update this code when newer versions of JS
// are released. For now, we try to provide some upward compatibility
// so that future versions of Nav and IE will show they are at
// *least* JS 1.x capable. Always check for JS version compatibility
// with > or >=.
else if (is_nav6up) is_js = 1.5;
// NOTE: ie5up on mac is 1.4
else if (is_ie5up) is_js = 1.3

// HACK: no idea for other browsers; always check for JS version with > or >=
else is_js = 0.0;