//  Functions:
//  ---------------------------------
//  Browser()
//  pageMousedown(event)
//  buttonClick(event, menuId, plaatsing)
//  buttonMouseover(event, menuId, plaatsing)
//  depressButton(button, plaatsing, menuId)
//  resetButton(button)
//  menuMouseover(event)
//  closeSubMenu(menu)
//  menuInit(menu)
//  getContainerWith(node, tagName, className)
//  hasClassName(el, name)
//  removeClassName(el, name)
//  getPageOffsetLeft(el)
//  getPageOffsetTop(el)



function Browser() {

  var ua, s, i;

  this.isIE    = false;  // Internet Explorer
  this.isOP    = false;  // Opera
  this.isNS    = false;  // Netscape
  this.version = null;

  ua = navigator.userAgent;

  s = "Opera";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isOP = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }

  s = "Netscape6/";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isNS = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }

  // Treat any other "Gecko" browser as Netscape 6.1.

  s = "Gecko";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isNS = true;
    this.version = 6.1;
    return;
  }

  s = "MSIE";
  if ((i = ua.indexOf(s))) {
    this.isIE = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }
}

var browser = new Browser();

//----------------------------------------------------------------------------
// Code for handling the menu bar and active button.
//----------------------------------------------------------------------------

var activeButton = null;

/* [MODIFIED] This code commented out, not needed for activate/deactivate
   on mouseover.

// Capture mouse clicks on the page so any active button can be
// deactivated.

if (browser.isIE)
  document.onmousedown = pageMousedown;
else
  document.addEventListener("mousedown", pageMousedown, true);


function pageMousedown(event) {

  var el;

  // If there is no active button, exit.

  if (activeButton == null)
    return;

  // Find the element that was clicked on.

  if (browser.isIE)
    el = window.event.srcElement;
  else
    el = (event.target.tagName ? event.target : event.target.parentNode);

  // If the active button was clicked on, exit.

  if (el == activeButton)
    return;

  // If the element is not part of a menu, reset and clear the active
  // button.

  if (getContainerWith(el, "DIV", "menu") == null) {
    resetButton(activeButton);
    activeButton = null;
  }
}
[END MODIFIED] */

function buttonClick(event, menuId, plaatsing) {

  var button;

  // Get the target button element.

  if (browser.isIE) {
    button = window.event.srcElement;
    if (button.tagName == 'A') {
      button = button.parentNode;
    };
  }
  else {
    button = event.currentTarget;
  }

  // Blur focus from the link to remove that annoying outline.

  if (browser.isIE) { button.blur(); }

  // Associate the named menu to this button if not already done.
  // Additionally, initialize menu display.

  if (button.menu == null) {
    button.menu = document.getElementById(menuId);
    if (button.menu.isInitialized == null)
      menuInit(button.menu);
  }

 // [MODIFIED] Added for activate/deactivate on mouseover.

  // Set mouseout event handler for the button, if not already done.

  if (button.onmouseout == null)
    button.onmouseout = buttonOrMenuMouseout;

  // Exit if this button is the currently active one.

  if (button == activeButton)
    return false;

  // [END MODIFIED]

  // Reset the currently active button, if any.

  if (activeButton != null) {
    resetButton(activeButton);
    activeButton = null;
  }

  // Activate this button, unless it was the currently active one.

  if (button != activeButton) {
    depressButton(button, plaatsing, menuId);
    activeButton = button;
  }
  else {
    activeButton = null;
  }

  return false;
}


function buttonMouseover(event, menuId, plaatsing) {

  var button;

 // [MODIFIED] Added for activate/deactivate on mouseover.

  // Activates this button's menu if no other is currently active.

  if (activeButton == null) {
    buttonClick(event, menuId);
    return;
  }

  // [END MODIFIED]

  // Find the target button element.

  if (browser.isIE)
    button = window.event.srcElement;
  else
    button = event.currentTarget;

  // If any other button menu is active, make this one active instead.

  if (activeButton != null && activeButton != button)
    buttonClick(event, menuId, plaatsing);
}


function depressButton(button, plaatsing, menuId) {

  var x, y;
	var verplaatsingX, verplaatsingY;
  var txtStatus;

  // Update the button's style class to make it look like it's depressed.
  // Find out first it there's an element called 'el_' + menuId
  // If so, then assign it the style class. Otherwise assign it tot the button element

  //elClassName = 'el_' + menuId;
  //if (document.getElementById(elClassName)) {
  //  elClass = document.getElementById(elClassName);
  //}
  //else {
  //  elClass = button;
  //}

  //if (elClass.id.substr(0,3) == 'el_') { elClass.className += " menuButtonActive"; }

  // [MODIFIED] Added for activate/deactivate on mouseover.

  // Set mouseout event handler for the button, if not already done.

  if (button.onmouseout == null) { button.onmouseout = buttonOrMenuMouseout }
  if (button.menu.onmouseout == null) { button.menu.onmouseout = buttonOrMenuMouseout }
  // [END MODIFIED]

  // Position the associated drop down menu under the button and show it.

	if (plaatsing == "vert") {
		verplaatsingX = 0;
		verplaatsingY = 0;
	}

	else if (plaatsing == "servhorz") {
		verplaatsingX = -48;
		verplaatsingY = 34;
	}

	else {
		verplaatsingX = 0;
		verplaatsingY = 29; //button.offsetHeight;
	}

  // Positioning logic:
  // Find out first it there's an element called 'posimg_' + menuId
  // If so, then use it's position. Otherwise use the position of the button element

  imgPosName = 'posimg_' + menuId;
  if (document.getElementById(imgPosName)) {
    elPos = document.getElementById(imgPosName);
  }
  else {
    elPos = button;
  }

  x = getPageOffsetLeft(elPos) + verplaatsingX;
  y = getPageOffsetTop(elPos) + verplaatsingY;

  // For IE, adjust position.

  if (browser.isIE) {
    x += button.offsetParent.clientLeft;
    y += button.offsetParent.clientTop;
  }

	subMenuWidth = button.menu.offsetWidth;
	maxPosY = document.documentElement.clientWidth - 10;
	if ( x + subMenuWidth > maxPosY ) { x = maxPosY - subMenuWidth; }

  button.menu.style.left = x + "px";
  button.menu.style.top  = y + "px";
  button.menu.style.visibility = "visible";



}


function resetButton(button) {

  // Restore the button's style class.

  //removeClassName(button, "menuButtonActive");

  // Hide the button's menu, first closing any sub menus.

  if (button.menu != null) {
    closeSubMenu(button.menu);
    button.menu.style.visibility = "hidden";
  }

}

//----------------------------------------------------------------------------
// Code to handle the menus and sub menus.
//----------------------------------------------------------------------------

function menuMouseover(event) {

  var menu;

  // Find the target menu element.

  if (browser.isIE)
    menu = getContainerWith(window.event.srcElement, "DIV", "menu");
  else
    menu = event.currentTarget;

  // Close any active sub menu.

  if (menu.activeItem != null)
    closeSubMenu(menu);
}


function menuItemMouseover(event, menuId) {

  var item, menu, x, y;

  // Find the target item element and its parent menu element.

  if (browser.isIE)
    item = getContainerWith(window.event.srcElement, "A", "menuItem");
  else
    item = event.currentTarget;
  menu = getContainerWith(item, "DIV", "menu");

  // Close any active sub menu and mark this one as active.

  if (menu.activeItem != null)
    closeSubMenu(menu);
  menu.activeItem = item;

  // Highlight the item element.

  //item.className += " menuItemHighlight";

  // Initialize the sub menu, if not already done.

  if (item.subMenu == null) {
    item.subMenu = document.getElementById(menuId);
    if (item.subMenu.isInitialized == null)
      menuInit(item.subMenu);
  }

  // [MODIFIED] Added for activate/deactivate on mouseover.

  // Set mouseout event handler for the sub menu, if not already done.

  if (item.subMenu.onmouseout == null)
    item.subMenu.onmouseout = buttonOrMenuMouseout;

  // [END MODIFIED]

  // Get position for submenu based on the menu item.

  x = getPageOffsetLeft(item) + item.offsetWidth;
  y = getPageOffsetTop(item);

  // Adjust position to fit in view.

  var maxX, maxY;

  if (browser.isIE) {
    maxX = Math.max(document.documentElement.scrollLeft, document.body.scrollLeft) +
      (document.documentElement.clientWidth != 0 ? document.documentElement.clientWidth : document.body.clientWidth);
    maxY = Math.max(document.documentElement.scrollTop, document.body.scrollTop) +
      (document.documentElement.clientHeight != 0 ? document.documentElement.clientHeight : document.body.clientHeight);
  }
  if (browser.isOP) {
    maxX = document.documentElement.scrollLeft + window.innerWidth;
    maxY = document.documentElement.scrollTop  + window.innerHeight;
  }
  if (browser.isNS) {
    maxX = window.scrollX + window.innerWidth;
    maxY = window.scrollY + window.innerHeight;
  }
  maxX -= item.subMenu.offsetWidth;
  maxY -= item.subMenu.offsetHeight;

  if (x > maxX)
    x = Math.max(0, x - item.offsetWidth - item.subMenu.offsetWidth
      + (menu.offsetWidth - item.offsetWidth));
  y = Math.max(0, Math.min(y, maxY));

  // Position and show it.

  item.subMenu.style.left = x + "px";
  item.subMenu.style.top  = y-6 + "px";
  item.subMenu.style.visibility = "visible";

  // Stop the event from bubbling.

  if (browser.isIE)
    window.event.cancelBubble = true;
  else
    event.stopPropagation();
}


function closeSubMenu(menu) {

  if (menu == null || menu.activeItem == null)
    return;

  // Recursively close any sub menus.

  if (menu.activeItem.subMenu != null) {
    closeSubMenu(menu.activeItem.subMenu);
    menu.activeItem.subMenu.style.visibility = "hidden";
    menu.activeItem.subMenu = null;
  }
  //removeClassName(menu.activeItem, "menuItemHighlight");
  menu.activeItem = null;
}

// [MODIFIED] Added for activate/deactivate on mouseover. Handler for mouseout
// event on buttons and menus.

function buttonOrMenuMouseout(event) {

  var el;

  // If there is no active button, exit.

  if (activeButton == null)
    return;

  // Find the element the mouse is moving to.

  if (browser.isIE)
    el = window.event.toElement;
  else if (event.relatedTarget != null)
      el = (event.relatedTarget.tagName ? event.relatedTarget : event.relatedTarget.parentNode);

  // If the element is not part of a menu, reset the active button.

  if (getContainerWith(el, "DIV", "menu") == null) {
    resetButton(activeButton);
    activeButton = null;
  }
}

// [END MODIFIED]

//----------------------------------------------------------------------------
// Code to initialize menus.
//----------------------------------------------------------------------------

function menuInit(menu) {

  var itemList, spanList;
  var textEl, arrowEl;
  var itemWidth;
  var w, dw;
  var i, j;

  // For IE, replace arrow characters.

//  if (browser.isIE) {
//    menu.style.lineHeight = "2.5ex";
//    spanList = menu.getElementsByTagName("SPAN");
//    for (i = 0; i < spanList.length; i++)
//      if (hasClassName(spanList[i], "menuItemArrow")) {
//        spanList[i].style.fontFamily = "Webdings";
//        spanList[i].firstChild.nodeValue = "4";
//      }
//  }

  // Find the width of a menu item.

  itemList = menu.getElementsByTagName("A");
  if (itemList.length > 0)
    itemWidth = itemList[0].offsetWidth;
  else
    return;

  // For items with arrows, add padding to item text to make the
  // arrows flush right.

//  for (i = 0; i < itemList.length; i++) {
//    spanList = itemList[i].getElementsByTagName("SPAN");
//    textEl  = null;
//    arrowEl = null;
//    for (j = 0; j < spanList.length; j++) {
//      if (hasClassName(spanList[j], "menuItemText"))
//        textEl = spanList[j];
//      if (hasClassName(spanList[j], "menuItemArrow"))
//        arrowEl = spanList[j];
//    }
//    if (textEl != null && arrowEl != null) {
//      //textEl.style.paddingRight = (itemWidth - (textEl.offsetWidth + arrowEl.offsetWidth)) + "px";
//      // For Opera, remove the negative right margin to fix a display bug.
//      if (browser.isOP)
//        arrowEl.style.marginRight = "0px";
//    }
//  }

  // Fix IE hover problem by setting an explicit width on first item of
  // the menu.

  if (browser.isIE) {
    w = itemList[0].offsetWidth;
    itemList[0].style.width = w + "px";
    dw = itemList[0].offsetWidth - w;
    w -= dw;
    itemList[0].style.width = w + "px";
  }

  // Mark menu as initialized.

  menu.isInitialized = true;
}

//----------------------------------------------------------------------------
// General utility functions.
//----------------------------------------------------------------------------

function getContainerWith(node, tagName, className) {

  // Starting with the given node, find the nearest containing element
  // with the specified tag name and style class.

  while (node != null) {
    if (node.tagName != null && node.tagName == tagName && hasClassName(node, className))
      return node;
    node = node.parentNode;
  }

  return node;
}

function hasClassName(el, name) {

  var i, list;

  // Return true if the given element currently has the given class
  // name.

  list = el.className.split(" ");
  for (i = 0; i < list.length; i++)
    if (list[i] == name)
      return true;

  return false;
}

function removeClassName(el, name) {

  var i, curList, newList;

  if (el.className == null)
    return;

  // Remove the given class name from the element's className property.

//  newList = new Array();
//  curList = el.className.split(" ");
//  for (i = 0; i < curList.length; i++)
//    if (curList[i] != name)
//      newList.push(curList[i]);
//  el.className = newList.join(" ");
}

function getPageOffsetLeft(el) {

  var x;

  // Return the x coordinate of an element relative to the page.

  x = el.offsetLeft;
  if (el.offsetParent != null)
    x += getPageOffsetLeft(el.offsetParent);

  return x;
}

function getPageOffsetTop(el) {

  var y;

  // Return the x coordinate of an element relative to the page.

  y = el.offsetTop;
  if (el.offsetParent != null)
    y += getPageOffsetTop(el.offsetParent);

  return y;
}

//]]>