/*****************************************************************************
DESCRIPTION
Dynamic Menu

MODIFICATION HISTORY
Date         Who              What
------------ ---------------- ------------------------------------------------
01-JUN-2003  BellingaM        Horizontal and Vertical menu support
01-JUL-2003  SpitR            hideSelectboxes implemented           
06-AUG-2003  MeursJ           hideSelectboxes for submenus
*****************************************************************************/
function Browser()
{
/**************************************************************** 
DESCRIPTION
The Browser object is used for basic browser detection.

MODIFICATION HISTORY
When       Who       What
---------- --------- --------------------------------------------
01-09-2003 MeursJ    Created
*****************************************************************/
  var a = navigator.userAgent;
	
  var WIN = a.indexOf("Win") != -1;
  var MAC = a.indexOf("Mac") != -1;
  var LIN = a.indexOf("Lin") != -1;
	
  var NS  = navigator.appName == "Netscape";
  var IE  = navigator.appName == "Microsoft Internet Explorer";

  this.version = parseInt(navigator.appVersion);

  this.isNS   = ( NS && this.version >= 4 );
  this.isNSw  = ( this.isNS && WIN );
  this.isNSm  = ( this.isNS && MAC );
  this.isNSl  = ( this.isNS && LIN );
  this.isNS4  = ( NS && a.indexOf("Mozilla/4") != -1 );
  this.isNS6  = ( NS && a.indexOf("Mozilla/5") != -1 );
	
  this.isIE   = ( IE && this.version >= 4 );
  this.isIEw  = ( this.isIE && WIN );
  this.isIEm  = ( this.isIE && MAC );
  this.isIE4  = ( a.indexOf("MSIE 4") != -1 );
  this.isIE5  = ( a.indexOf("MSIE 5.0") != -1 );
  this.isIE55 = ( a.indexOf("MSIE 5.5") != -1 );
  this.isIE6  = ( a.indexOf("MSIE 6.0") != -1 );
  
  // minimale browser ondersteuning
  this.min    = ( NS || IE );
} // end Browser

var browser = new Browser();

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

var activeButton = null;

function buttonClick(event, menuId,p_type) {

  var button;

  // Get the target button element.

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

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

  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,p_type);

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

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

  return false;
}

function buttonMouseover(event, menuId,p_type) {

  var button;

  // [MODIFIED] Added for activate/deactivate on mouseover.
  // Activates this buttons menu if no other is currently active.
  if (activeButton == null) {
    buttonClick(event, menuId,p_type);
    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);
}

function depressButton(button,p_type) {

  var x, y;
  var itemList, spanList;
  var itemWidth, itemHeight;

  // Update the buttons style class to make it look like its
  // depressed.

  button.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 (p_type=="HORZ")
  {
    x = getPageOffsetLeft(button);
    y = getPageOffsetTop(button) + button.offsetHeight;
  }
  else if (p_type =="VERT") {
    x = getPageOffsetLeft(button) + button.offsetWidth;
    y = getPageOffsetTop(button);
  }
  // For IE, adjust position.

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

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

  // hide interfering select boxes
  // Find the width of a menu .

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

  // Find the height of a menu.

  if (itemList.length > 0)
    itemHeight = itemList.length * itemList[0].offsetHeight;
  else
    itemWidth = 0;
  //
  
  hideSelectboxes(x,y,itemWidth,itemHeight,3);
}

function resetButton(button,p_type) {

  // Restore the buttons style class.

  removeClassName(button, "menuButtonActive");

  // Hide the buttons menu, first closing any sub menus.

  if (button.menu != null) {
    closeSubMenu(button.menu);
    button.menu.style.visibility = "hidden";
  }
	
  // show interfering select boxes  
  hideSelectboxes(0,0,0,0,3);
}

//----------------------------------------------------------------------------
// 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;
	var itemList, itemWidth, itemHeight;

  // 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.isNS) {
    maxX = window.scrollX + window.innerWidth;
    maxY = window.scrollY + window.innerHeight;
  }
  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);
  }
  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 the sub menu.

  item.subMenu.style.left = x + "px";
  item.subMenu.style.top  = y + "px";
  item.subMenu.style.visibility = "visible";
	
	// [MODIFIED 06-AUG-2003] Hide interfering select boxes
  // Find the width of a menu.
  itemList = item.subMenu.getElementsByTagName("A");
  if (itemList.length > 0)
    itemWidth = itemList[0].offsetWidth;
  else
    itemWidth = 0;

  // Find the height of a menu.
  if (itemList.length > 0)
    itemHeight = itemList.length * itemList[0].offsetHeight;
  else
    itemWidth = 0;
  
  hideSelectboxes(x,y,itemWidth,itemHeight,3);
  // [END MODIFIED]	

  // 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";
  }


// onderstaande fix uitgezet

  // 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 elements 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;
}

/******************************************
hideSelectboxes (last updated: 11/13/02)
IE5+ and NS6+ only - ignores the other browsers

Because of the selectbox bug in the browsers that makes 
selectboxes have the highest z-index whatever you do 
this script will check for selectboxes that interfear with
your menu items and then hide them. 
*****************************************/
function hideSelectboxes(x,y,w,h,l){
  var selx,sely,selw,selh,i;
	
  if (!this.sel) {
    this.sel = document.body.getElementsByTagName("SELECT");
    this.sel.level = 0;
  }
	
  var sel = this.sel;
  for (i=0;i<sel.length;i++) {
	  selx = 0;
	  sely = 0;
	  var selp;
	  if (sel[i].offsetParent) {
	    selp = sel[i];
	    while(selp.offsetParent) {
  	    selp = selp.offsetParent;
	    	selx += selp.offsetLeft;
    		sely += selp.offsetTop;
		  }
    }
	  selx += sel[i].offsetLeft;
	  sely += sel[i].offsetTop;
    selw = sel[i].offsetWidth;
	  selh = sel[i].offsetHeight;			
    if (selx+selw>x && selx<x+w && sely+selh>y && sely<y+h) {
      if (sel[i].style.visibility != "hidden") {
		    sel[i].level = l;
		    sel[i].style.visibility = "hidden";
		  }
    } 
		else if (l<=sel[i].level ) sel[i].style.visibility="visible";
  }
}