//<![CDATA[

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

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

function Browser() {
   var ua, s, i;

   this.isIE = false;      // Internet Explorer
   this.isNS = false;      // Netscape
   this.isSafari = false;  // Safari
   this.isMac = false;     // Mac OS
   this.isWindows = false; // Windows OS
   this.version = null;

   ua = navigator.userAgent;

   s = "Mac";
   if ((i = ua.indexOf(s)) >= 0) {
      this.isMac = true;
   }

   s = "Windows";
   if ((i = ua.indexOf(s)) >= 0)   {
      this.isWindows = true;
   }

   s = "MSIE";
   if ((i = ua.indexOf(s)) >= 0)   {
      this.isIE = 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;
   }

   s = "Safari/";
   if ((i = ua.indexOf(s)) >= 0)   {
      this.isNS = true;
      this.isSafari = 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();

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

var activeButton = null;

// 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;
   }
}

function buttonClick(event, menuId) {
   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);
      }
   }

   // 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;

   // 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;

   // Update the button's style class to make it look like it's depressed.

   button.className += " menuButtonActive";

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

   x = getPageOffsetLeft(button);
   y = getPageOffsetTop(button) + button.offsetHeight;

   // 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 the SOEditor editing region to prevent flickering with the menu overlap

     if (browser.isIE) {
      var editorElements = document.getElementsByTagName("editor", "so");
      if (editorElements.length > 0)
      {
         for (var i = 0; i < editorElements.length; i++) {
            editorElements[i].style.display = "none";
         }
      }
   }

   // Hide windowed elements within the menu div region for IE browsers

   if (browser.isIE && browser.isWindows) {
      var iFrame = document.getElementById("ifrMainMenu");
      iFrame.style.left = button.menu.style.left;
      iFrame.style.top = button.menu.style.top;
      iFrame.style.width = button.menu.clientWidth + 4;
      iFrame.style.height = button.menu.clientHeight + 4;
      iFrame.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";

      // Show the SOEditor editing region if it exists

      if (browser.isIE) {
         var editorElements = document.getElementsByTagName("editor", "so");
         if (editorElements.length > 0) {
            for (var i = 0; i < editorElements.length; i++) {
               editorElements[i].style.display = "inline";
            }
         }
      }

      // Show windowed elements hidden by the menu div region for IE browsers

      if (browser.isIE) {
         iFrame = document.getElementById("ifrMainMenu");
         iFrame.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);
      }
   }

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

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

   // Adjust submenu for Safari browsers

   if (browser.isSafari) {
      x -= 9;
      y -= 10;
   }

   // 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 = (document.documentElement.scrollLeft != 0 ? document.documentElement.scrollLeft : document.body.scrollLeft) +
         (document.documentElement.clientWidth != 0 ? document.documentElement.clientWidth : document.body.clientWidth);
      maxY = (document.documentElement.scrollTop != 0 ? 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 it.

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

   // Hide windowed elements within the menu div region for IE browsers

   if (browser.isIE && browser.isWindows) {
      iFrame = document.getElementById("ifrSubMenu");
      iFrame.style.left = item.subMenu.style.left;
      iFrame.style.top = item.subMenu.style.top;
      iFrame.style.width = item.subMenu.clientWidth + 4;
      iFrame.style.height = item.subMenu.clientHeight + 4;
      iFrame.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";

      // Show windowed elements hidden by the menu div region for IE browsers

      if (browser.isIE) {
         iFrame = document.getElementById("ifrSubMenu");
         iFrame.style.visibility = "hidden";
      }

      menu.activeItem.subMenu = null;
   }
   removeClassName(menu.activeItem, "menuItemHighlight");

   menu.activeItem = null;
}

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

  // 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;
}

//]]>