function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

function addResizeEvent(func) {
  var oldonresize = window.onresize;
  if (typeof window.onresize != 'function') {
    window.onresize = func;
  } else {
    window.onresize = function() {
      oldonresize();
      func();
    }
  }
}


function openFaq(faqNode) {
	divEls = document.getElementsByTagName('DIV');
	for (i = 0; i < divEls.length; i++) {
		divEl = divEls[i];
		if (divEl.className == "antwoord") {
			divEl.style.display='none';
		}
	}
	faqEls = faqNode.getElementsByTagName('DIV');
	for (i = 0; i < faqEls.length; i++) {
		faqEl = faqEls[i];
		if (faqEl.className == "antwoord") {
			faqEl.style.display='block';
		}
	}
	return false;
}

sfHover = function() {
	if (document.getElementById("suckerfish_topmenu")) {
		var sfEls = document.getElementById("suckerfish_topmenu").getElementsByTagName("LI");
		for (var i=0; i<sfEls.length; i++) {
			sfEls[i].onmouseover=function() {
				this.className+=" sfhover";
			}
			sfEls[i].onmouseout=function() {
				this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
			}
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);



function closeAllSubmenus() {
	mainNav = document.getElementById('navigation-main');
	uls = mainNav.getElementsByTagName('UL');
	for (i = 0; i < uls.length; i++) {
		ulId = uls[i].id;
		navlink_id = 'navlink' + ulId.replace(/nav/,'');
		navlink = document.getElementById(navlink_id);
		navlink.style.color = '';
		navlink.style.backgroundColor = '';
		uls[i].style.display="none";
	}
}
function openSubmenu(navigationitem_id) {
	closeAllSubmenus();
	submenu = document.getElementById('navlink'+navigationitem_id); 
	submenu.style.backgroundColor='#A8052F';
	submenu.style.color='#ffffff';
	submenu.style.display='block'
	
}
function openSubmenu(navigationitem_id) {
	closeAllSubmenus();
	
	navlink = document.getElementById('navlink' + navigationitem_id);
	navlink.style.backgroundColor='#A8052F';
	navlink.style.color='#ffffff';
	
	navmenu = document.getElementById('nav' + navigationitem_id);
	navmenu.style.display='block';
}

function myhasClass(ele,cls) {
	return ele.className.match(new RegExp('(\\s|^)'+cls+'(\\s|$)'));
}
function myaddClass(ele,cls) {
	if (!myhasClass(ele,cls)) ele.className += " "+cls;
}
function myremoveClass(ele,cls) {
	if (myhasClass(ele,cls)) {
		var reg = new RegExp('(\\s|^)'+cls+'(\\s|$)');
		ele.className=ele.className.replace(reg,' ');
	}
}

/**
 * Cross browser mozilla's 'onDOMContentLoaded' implementation.
 * Executes a function when the dom tree is loaded without waiting for images.
 * Registers function +fn+ will be executed when the dom tree is loaded without waiting for images. 
 * 
 * Example:
 *
 *  Event.domReady.add(function() {
 *    ...
 *  });
 */
if (typeof Event == 'undefined') Event = new Object();
Event.domReady = {
  add: function(fn) {
    
    //-----------------------------------------------------------
    // Already loaded?
    //-----------------------------------------------------------
    if (Event.domReady.loaded) return fn();
    
    //-----------------------------------------------------------
    // Observers
    //-----------------------------------------------------------
    var observers = Event.domReady.observers;
    if (!observers) observers = Event.domReady.observers = [];
    // Array#push is not supported by Mac IE 5
    observers[observers.length] = fn;
    
    //-----------------------------------------------------------
    // domReady function
    //-----------------------------------------------------------
    if (Event.domReady.callback) return;
    Event.domReady.callback = function() {
      if (Event.domReady.loaded) return;
      
      Event.domReady.loaded = true;
      if (Event.domReady.timer) {
        clearInterval(Event.domReady.timer);
        Event.domReady.timer = null;
      }
      
      var observers = Event.domReady.observers;
      for (var i = 0, length = observers.length; i < length; i++) {
        var fn = observers[i];
        observers[i] = null;
        fn(); // make 'this' as window
      }
      Event.domReady.callback = Event.domReady.observers = null;
    };
    
    //-----------------------------------------------------------
    // Emulates 'onDOMContentLoaded'
    //-----------------------------------------------------------
    var ie = !!(window.attachEvent && !window.opera);
    var webkit = navigator.userAgent.indexOf('AppleWebKit/') > -1;
    
    if (document.readyState && webkit) {
      
      // Apple WebKit (Safari, OmniWeb, ...)
      Event.domReady.timer = setInterval(function() {
        var state = document.readyState;
        if (state == 'loaded' || state == 'complete') {
          Event.domReady.callback();
        }
      }, 50);
      
    } else if (document.readyState && ie) {
      
      // Windows IE 
      var src = (window.location.protocol == 'https:') ? '://0' : 'javascript:void(0)';
      document.write(
        '<script type="text/javascript" defer="defer" src="' + src + '" ' + 
        'onreadystatechange="if (this.readyState == \'complete\') Event.domReady.callback();"' + 
        '><\/script>');
      
    } else {
      
      if (window.addEventListener) {
        // for Mozilla browsers, Opera 9
        document.addEventListener("DOMContentLoaded", Event.domReady.callback, false);
        // Fail safe 
        window.addEventListener("load", Event.domReady.callback, false);
      } else if (window.attachEvent) {
        window.attachEvent('onload', Event.domReady.callback);
      } else {
        // Legacy browsers (e.g. Mac IE 5)
        var fn = window.onload;
        window.onload = function() {
          Event.domReady.callback();
          if (fn) fn();
        }
      }
      
    }
    
  }
}