//*****************************************************************************
// Do not remove this notice.
//
// Copyright 2000 by Mike Hall.
// See http://www.brainjar.com for terms of use.
//*****************************************************************************

//*****************************************************************************
// This script is an altered version of the Brainjar menu sample 
//   as permitted by the above referenced terms of use.
//
// This script supports the SJOG Portal menu system.
//*****************************************************************************
// CHANGES
// 1.0  RTindall   28May2003  Take constants from pop positioning, 3 for vertical
//                            and 1 for horizontal.
// 1.1  RTindall   28May2003  Add IE5.0 fix for lack of push() method
// 1.2  RTindall   28May2003  ATTEMPT to fix positioning problems inside Portal
//                            1. comment out all offset adjustments
// 2.0  RTindall   30Aug2003  Add function rewriteVArrows to be called for main vertical
//                            menubar to add right hand arrows where submenus exist
// 3.0  RTindall   01Sep2003  Add function reformatVBar + other various compatibility code
//                            to support main vertical menubar initialisation 
//                            - arrows and padding.
//                            NOTE - still has os compatibility issues and hence has not
//                            been implemented. 
// 4.0  RTindall   28Oct2003  Implement iframe fix for menu, form select element 
//                            collision problem for IE (fix only for ie5.5+)
// 4.1  RTindall   03Nov2003  Alter conditional for iframe overlap fix to only apply if ie5.5+
// 5.0  RTindall   29Jan2004  Adding compatibility allowances for MAC IE
//                            This inc some pad, width and offset hardcoded values
//                            See depressButton, menuItemMouseover and menuInit
//

//----------------------------------------------------------------------------
// Code to determine the browser and version.
//----------------------------------------------------------------------------

function Browser() {

  var ua, s, i;

  this.isIE    = false;  // Internet Explorer
  this.isNS    = false;  // Netscape
  this.isMacIE   = false;  // Macintosh Internet Explorer
  this.version = null;

  ua = navigator.userAgent;
  av = navigator.appVersion;

  // Check type and version
  s = "MSIE";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isIE = true;
    this.version = parseFloat(ua.substr(i + s.length));

    // Further define IE if OS is Mac
    s = "Macintosh";
    if (av.indexOf(s) >= 0) 
      this.isMacIE = true;

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

}

var browser = new Browser();

//----------------------------------------------------------------------------
// IE5.0 fix for missing Array.push method
//----------------------------------------------------------------------------

if(!Array.prototype.push) {
	function array_push() {
		for(var i=0;i<arguments.length;i++){
			this[this.length]=arguments[i]
		};
		return this.length;
	}
	Array.prototype.push = array_push;
}


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

var activeButton = null;



/****************************************************************************
[START COMMENTOUT]
   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 COMMENTOUT]
****************************************************************************/



function buttonClick(event, menuId) {

  var button;

  // Get the target button element.
  if (browser.isIE)
    button = window.event.srcElement;
  else
    button = event.currentTarget;


  // ARROWS AND PADDING SUPPORT
  if (hasClassName(button, "vmenuBarText") || hasClassName(button, "vmenuBarArrow")) {
    if (browser.isIE)
      button = getContainerWith(window.event.srcElement, "A", "vmenuButton");
    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);

  // Activate this button, unless it was the currently active one.
  if (button != activeButton) {
    depressButton(button);
    activeButton = button;
  }
  else
    activeButton = null;

  return false;
}

function buttonMouseover(event, menuId) {

  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);
}

function depressButton(button) {

  var x, y;
  var lIFrame;
  var vmenuBarTbl;

  // Update the button's style class 
  // to make it look like it's 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.
  // Vertical menu
  if (hasClassName(button, "vmenuButton")) {

    // For MAC IE y axis 
    // Required due to MAC IE position and width bugs
    if (browser.isMacIE) {
      vmenuBarTbl = document.getElementById("vmenuBarTbl");
      x = getPageOffsetLeft(button) + (button.offsetWidth - 9);
      y = button.offsetTop - getPageOffsetTop(vmenuBarTbl);
    }
    else {
      x = getPageOffsetLeft(button) + (button.offsetWidth - 3);
      y = getPageOffsetTop(button);
    }
  }
  // Horizontal menu
  else if (hasClassName(button, "menuButton")) {
    x = getPageOffsetLeft(button);
    y = getPageOffsetTop(button) + (button.offsetHeight - 1);
  }

  // For IE, adjust position.
  if (browser.isIE) {
    x += button.offsetParent.clientLeft;
    
    // For MAC adjust with hardcode offset due to TD offset bugs
    if (browser.isMacIE) 
      y -= 2;
    else
      y += button.offsetParent.clientTop;
  }

  // If IE5.5+, shim iframe under div for select overlap problem
  if (browser.isIE && (browser.version >= 5.5)) {
    lIFrame = document.getElementById("HMIFrame");
    lIFrame.style.left = x + "px";
    lIFrame.style.top = y + "px";
    lIFrame.style.width = button.menu.offsetWidth;
    lIFrame.style.height = button.menu.offsetHeight;
    lIFrame.style.display = "block";
  }

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

}

function resetButton(button) {

  var lIFrame;

  // Restore the button's style class.
  removeClassName(button, "menuButtonActive");

  // If IE5.5+, manage iframe fix for select overlap problem
  if (browser.isIE && (browser.version >= 5.5)) {
    lIFrame = document.getElementById("HMIFrame");
    lIFrame.style.display = "none";
  }

  // 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;
  var lIFrame;

  // 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);
  }

  // [START 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));


  // If MAC IE then override x and y with simplistic values due to width bugs
  // Deliberately set 20px less than Mac IE popup width
  if (browser.isMacIE) {
    x = getPageOffsetLeft(item) + 130;
    y = getPageOffsetTop(item);
  }


  // If IE5.5+, shim iframe under div for select overlap problem
  if (browser.isIE && (browser.version >= 5.5)) {
    lIFrame = document.getElementById("HMIFrame");
    lIFrame.style.left = x + "px";
    lIFrame.style.top = y + "px";
    lIFrame.style.width = item.subMenu.offsetWidth;
    lIFrame.style.height = item.subMenu.offsetHeight;
    lIFrame.style.display = "block";
  }


  // Position and show the sub menu.
  item.subMenu.style.left = x + "px";
  item.subMenu.style.top  = y + "px";
  item.subMenu.style.visibility = "visible";

  // Stop the event from bubbling.
  if (browser.isIE)
    window.event.cancelBubble = true;
  else
    event.stopPropagation();
}


function closeSubMenu(menu) {

  var lIFrame;

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

  // If IE5.5+, manage the iframe fix for select overlap problem
  if (browser.isIE && (browser.version >= 5.5)) {
    lIFrame = document.getElementById("HMIFrame");
    lIFrame.style.display = "none";
  }

  // 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;


  // Set padding UNLESS Mac IE
  if (!browser.isMacIE) {
  
    // 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";
    }
  }


  // Fix IE5.0 hover problem by explicit widths
  if (browser.isIE) {

    // If MAC IE then must set width explicitly vs relatively
    if (browser.isMacIE){
      for (i = 0; i < itemList.length; i++) {
        itemList[i].style.width = "150px";
      }
    }
    else {
      for (i = 0; i < itemList.length; i++) {
        w = itemList[i].offsetWidth;
        itemList[i].style.width = w + "px";
        dw = itemList[i].offsetWidth - w;
        w -= dw;
        itemList[i].style.width = w + "px";
      }
    }
  }

  // Mark menu as initialized.
  menu.isInitialized = true;
}


/****************************************************************************
[START COMMENTOUT]
   This code commented out.  Unresolved cross compatibility problems

function rewriteVArrows() {
// Rewrite the arrows for Vertical menubar if IE
// Implementation would have compatibility issues,
// Currently NOT implemented
  
  var arrowList;
  var i;

  if (browser.isIE) {
    arrowList = document.getElementsByName("varrow");
    for (i = 0; i < arrowList.length; i++){
      if (hasClassName(arrowList[i], "vmenuBarArrow")) {
        arrowList[i].style.fontFamily = "Webdings";
        arrowList[i].firstChild.nodeValue = "4";
      }
    }
  }
}
[END COMMENTOUT]
****************************************************************************/


/****************************************************************************
[START COMMENTOUT]
   This code commented out.  Unresolved cross compatibility problems

function reformatVBar() {
// Initialise the formatting for the Vertical MenuBar
// NOTE - this still has compatibility issues with NN and IE5.0
//        for padding and width calculation.  
// AND would have severe compatibility issues for Mac IE
// Possibly need to explicitly set the width of all items not 
//   just first.
// Currently NOT implemented
  
  var arrowList, itemList, spanList;
  var textEl, arrowEl;
  var itemWidth;
  var vmenuBar;
  var w, dw;
  var i, j;

  //Note: IE finds by ID, even with getElementsByName
  if (browser.isIE) {
    arrowList = document.getElementsByName("varrow");
    for (i = 0; i < arrowList.length; i++){
      if (hasClassName(arrowList[i], "vmenuBarArrow")) {
         arrowList[i].style.fontFamily = "Webdings";
         arrowList[i].firstChild.nodeValue = "4";
      }
    }
  }

  // Find the width of a menu bar item.
  itemList = document.getElementsByName("vmenuButton");
  if (itemList.length > 0)
    itemWidth = itemList[0].offsetWidth;
  else
    return;


  // If NOT IE, then find width of menubar itself
  if (!browser.isIE) {
    vmenuBar = getContainerWith(itemList[0], "DIV", "vmenuBar");
    itemWidth = vmenuBar.offsetWidth - itemList[0].offsetWidth;
  }

  // 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], "vmenuBarText"))
        textEl = spanList[j];
      if (hasClassName(spanList[j], "vmenuBarArrow"))
        arrowEl = spanList[j];
    }
    if (textEl != null && arrowEl != null)
      textEl.style.paddingRight = (itemWidth
        - (textEl.offsetWidth + arrowEl.offsetWidth)) + "px";
  }

  // 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";
  }
}
[END COMMENTOUT]
****************************************************************************/



//----------------------------------------------------------------------------
// 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;
}


//----------------------------------------------------------------------------
// END PACKAGE
//----------------------------------------------------------------------------