var isDOM = (document.getElementById ? true : false); 
var isIE4 = ((document.all && !isDOM) ? true : false);
var isNS4 = (document.layers ? true : false);
var isDyn = (isDOM || isIE4 || isNS4);


function getRef(id)
{
 if (isDOM) return document.getElementById(id);
 if (isIE4) return document.all[id];
 if (isNS4) return document.layers[id];
}

function getSty(id)
{
 return (isNS4 ? getRef(id) : getRef(id).style);
} 
function launchFlash2() {
      window.open("RF2004basic.swf","Flash","resizable=yes,toolbar=no,personalbar=no,menubar=no,status=yes,directories=no,scrollbars=no,width=810,height=660");
}

// *** MOUSEOVER/OUT CONTROL FUNCTIONS ***

// Hide timeout.
var popTimer = 0;
// Arrays holding highlighted menu items.
var litNow = new Array();

function popOver(menuNum, itemNum)
{
 clearTimeout(popTimer);

 // Hide all other menus & dim old highlighted items, still showing this menu.
 hideAllBut(menuNum);

 // Get tree of parent menu items and light them up - global variable!
 litNow = getTree(menuNum, itemNum);
 changeCol(true);

 // Get target menu to show - if it's nonzero, position & show it.
 targetNum = menu[menuNum][itemNum].target;
 if (targetNum > 0)
 {
  // Get current menu position - menu position plus item position in menu.
  thisX = parseInt(menu[menuNum][0].ref.left) + parseInt(menu[menuNum][itemNum].ref.left);
  thisY = parseInt(menu[menuNum][0].ref.top) + parseInt(menu[menuNum][itemNum].ref.top);

  // Add those to the target's offset to set the target's position, show it.
  with (menu[targetNum][0].ref)
  {
   left = thisX + menu[targetNum][0].x;
   top = thisY + menu[targetNum][0].y;
   visibility = 'visible';
  }
 }
}

function popOut(menuNum, itemNum)
{
 // If it's a root menu item that doesn't trigger a popout, hide now, else set timeout
 // to hide all menus in 1/2 sec... remember, another mouseover clears the timeout.
 if ((menuNum == 0) && !menu[menuNum][itemNum].target) hideAllBut(0);
 else popTimer = setTimeout('hideAllBut(0)', 500);
}

function popClick(menuNum, itemNum)
{
 with (menu[menuNum][itemNum])
 {
  switch (type)
  {
   // A JavaScript function? Eval() it and break out of switch.
   case 'js:': { eval(href); break }
   // Otherwise, point to the window if nothing else and navigate.
   case '': type = 'window';
   default: if (href) eval(type + '.location.href = "' + href + '"');
  }
 }

 // Whatever happens, hide the menus when clicked.
 hideAllBut(0);
}


function getTree(menuNum, itemNum)
{
 // Array index is the menu number. The contents are null (if that menu is not a parent)
 // or the item number in that menu that is an ancestor (to light it up).
 itemArray = new Array(menu.length);

 while(1)
 {
  itemArray[menuNum] = itemNum;
  // If we've reached the top of the hierarchy, return.
  if (menuNum == 0) return itemArray;
  itemNum = menu[menuNum][0].parentItem;
  menuNum = menu[menuNum][0].parentMenu;
 }
}

// Pass an array and a boolean to specify colour change, true = over colour.
// N.B: Uses global litNow array which contains items in hierarchy.
function changeCol(isOver)
{
 // Cycle through array searching for items to change.
 for (count = 0; count < litNow.length; count++)
 {
  // If item number is present, change its colour.
  if (litNow[count])
  {
   // Nest two WITH's, the last being more specific to allow item hover colours.
   with (menu[count][0]) with (menu[count][litNow[count]])
   {
    newCol = isOver ? overCol : backCol;

    // Change the colours of the div/layer background.
    if (isNS4) ref.bgColor = newCol;
    else ref.backgroundColor = newCol;
   }
  }
 }
}

function hideAllBut(menuNum)
{
 // Get array of parent menus (item numbers irrelevant, just pass '1').
 var keepMenus = getTree(menuNum, 1);

 // ...and work through it, hiding menus that are not its ancestors/itself.
 for (count = 0; count < menu.length; count++)
  if (!keepMenus[count] && menu[count]) menu[count][0].ref.visibility = 'hidden';

 // Dim all the items in litNow array.
 changeCol(false);
}


// *** MENU CONSTRUCTION FUNCTIONS ***


function Menu(isVert, popInd, x, y, width, pad, overCol, backCol, borderClass, textClass)
{
 // True or false - a vertical menu?
 this.isVert = isVert;
 // The popout indicator used (if any) for this menu.
 this.popInd = popInd
 // Position and size settings.
 this.x = x;
 this.y = y;
 this.width = width;
 this.pad = pad;
 // Colours of menu and items.
 this.overCol = overCol;
 this.backCol = backCol;
 // The stylesheet class used for item borders and the text within items.
 this.borderClass = borderClass;
 this.textClass = textClass;
 // Parent menu and item numbers, indexed later.
 this.parentMenu = null;
 this.parentItem = null;
 // Reference to the object's style properties (set later).
 this.ref = null;
}

function Item(text, href, type, length, spacing, target)
{
 this.text = text;
 this.href = href;
 this.type = type;
 this.length = length;
 this.spacing = spacing;
 this.target = target;
 // Reference to the object's style properties (set later).
 this.ref = null;
}

function createMenus()
{
 if (!isDyn) return;

 // Loop through menus, using properties of menu description object, i.e. x, y, width etc...
 for (currMenu = 0; currMenu < menu.length; currMenu++)
 if (menu[currMenu]) with (menu[currMenu][0])
 {
  // Variable for holding HTML for items and positions of next item.
  var str = '', itemX = 0, itemY = 0;

  // In NS4, since borders are assigned to the table rather than layer, increase padding.
  if (isNS4) pad++;

  // Remember, items start from 1 in the array (0 is menu object itself, above).
  // Also use properties of each item nested in the other with() for construction.
  for (currItem = 1; currItem < menu[currMenu].length; currItem++) with (menu[currMenu][currItem])
  {
   var itemID = 'menu' + currMenu + 'item' + currItem;

   // The width and height of the menu item - dependent on orientation!
   // NS6 disagrees with other browsers as to whether borders increase widths, so fix here.
   var shrink = (borderClass && isDOM && !document.all ? 2 : 0)
   var w = (isVert ? width : length) - shrink;
   var h = (isVert ? length : width) - shrink;

   // Create a div or layer text string with appropriate styles/properties.
   if (isDOM || isIE4)
   {
    str += '<div id="' + itemID + '" style="position: absolute; left: ' + itemX +
     '; top: ' + itemY + '; width: ' + w + '; height: ' + h + '; visibility: inherit; ';
    if (backCol) str += 'background: ' + backCol;
    str += '" ';
   }
   if (isNS4)
   {
    str += '<layer id="' + itemID + '" left="' + itemX + '" top="' + itemY + '" width="' + 
     w + '" height="' + h + '" visibility="inherit" ';
    if (backCol) str += 'bgcolor="' + backCol + '" ';
   }
   if (borderClass) str += 'class="' + borderClass + '" ';
   
   // Add mouseover and click handlers and finish div/layer.
   str += 'onMouseOver="popOver(' + currMenu + ',' + currItem + ')" onMouseOut="popOut(' +
     currMenu + ',' + currItem + ')" onClick="popClick(' + currMenu + ',' + currItem + ')">';



   // Add contents of item...

   if (target > 0)
   {
    // Set target's parents to this menu item.
    menu[target][0].parentMenu = currMenu;
    menu[target][0].parentItem = currItem;

    // Add a popout indicator - before text so it shows up below text in NS4.
    if (popInd)
    {
     if (isNS4) str += '<layer class="' + textClass + '" left="'+ (w - 15) + '" top="' +
      pad + '">' + popInd + '</layer>';
     else str += '<div class="' + textClass + '" style="position: absolute; left: ' + (w - 15) +
      '; top: ' + pad + '">' + popInd + '</div>';
    }
   }

   // For NS4, if a border is assigned, add a spacer to push border out to layer edges.
   // The text layer must completely overlay this table as well for proper click capturing.
   // Add a link both to generate an onClick event and to stop the ugly I-beam text cursor appearing.
   if (isNS4) str += (borderClass ? '<spacer type="block" width="' + (w - 8) + '" height="' +
    (h - 8) + '">' : '') +
    '<layer left="' + pad + '" top="' + pad + '" width="' + (w - (2 * pad)) + '" height="' +
    (h - (2 * pad)) + '"><a class="' + textClass + '" href="#" ' +
    'onClick="popClick(' + currMenu + ',' + currItem + '); return false" ' +
    'onMouseOver="status=\'\'; return true;">' + text + '</a></layer>';

   // IE4+/NS6 is an awful lot easier to work with sometimes.
   else str += '<div class="' + textClass + '" style="position: absolute; left: ' + pad +
    '; top: ' + pad + '; width: ' + (w - (2 * pad)) + '; height: ' + (h - (2 * pad)) +
    '">' + text + '</div>';

   // Finish off item.
   str += (isNS4 ? '</layer>' : '</div>');

   // Move next item position down or across by this item's length and additional spacing.
   // Subtract 1 so borders overlap slightly.
   if (isVert) itemY += length + spacing - 1;
   else itemX += length + spacing - 1;

  // End loop through items and with([menu[currMenu][currItem]).
  }



  // Now, write the menu to the document depending on browser capabilities.
  // N.B: Still using properties of menu[currMenu][0] like 'ref' etc...
   
  // Insert a div tag to the end of the BODY with menu HTML in place for IE4+.
  if (document.all)
  {
   // Give a small width and height to stop IE4 sizing to full body. Thanks to Jeff Blum
   // for pointing this out. Also, thanks to Paul Maden for helping debug this, apparently
   // the width must be a miniumum of 3 for it to work in IE4.
   document.body.insertAdjacentHTML('beforeEnd', '<div id="menu' + currMenu + 'div" ' +
    'style="position: absolute; width: 3; height: 3; visibility: hidden; z-index: 1000">' +
     str + '</div>');
   ref = getSty('menu' + currMenu + 'div');
  }
  // In NS6+ or other DOM but non-IE browsers, create a new DIV node and add text...
  else if (isDOM)
  {
   var newDiv = document.createElement('div');
   document.body.appendChild(newDiv);
   newDiv.innerHTML = str;
   ref = newDiv.style;
    
   ref.position = 'absolute';
   ref.visibility = 'hidden';
  }
  // In NS4, create a reference to a new layer and write the items to it.
  else if (isNS4)
  {
   ref = new Layer(0);
   ref.document.write(str);
   ref.document.close();
  }

  // Chuck some positions in here. Only really relevant for root menu.
  ref.left = x;
  ref.top = y;
  // Set the default cursor for the menu to be the hand (or 'pointer' if you're the W3C or
  // Mozilla Project and just trying to be difficult :)...
  if (!isNS4) ref.cursor = (document.all ? 'hand' : 'pointer');
  // IE has z-indices assigned already, IE4 doesn't like them done here for some reason.
  if (!document.all) ref.zIndex = 1000;

  // Now items have been written, loop through them again to set up references.
  for (currItem = 1; currItem < menu[currMenu].length; currItem++)
  {
   itemName = 'menu' + currMenu + 'item' + currItem;
   if (isDOM || isIE4) menu[currMenu][currItem].ref = getSty(itemName);
   if (isNS4)
   {
    menu[currMenu][currItem].ref = ref.document[itemName];
    // Also capture clicks on that item layer's document...
    with (ref.document[itemName])
    {
     document.captureEvents(Event.CLICK);
     document.onclick = new Function('popClick(' + currMenu + ', ' + currItem + ')');
    }
   }
  }

 // End loop through menus and with (menu[currMenu][0]).
 }

 // *** CENTRING FUNCTION ***  Uncomment this to centre menus.
 //resizeHandler()

 // Show the root menu now that's all over. Phew!
 menu[0][0].ref.visibility = 'visible';
}

// Syntaxes:    *** START EDITING HERE, READ THIS SECTION CAREFULLY! ***
//
// menu[menuNumber][0] = new Menu(Vertical menu? (true/false), 'popout indicator', left, top,
// width, padding, 'hover colour', 'background colour', 'border stylesheet', 'text stylesheet');
//
// Left and Top are measured on-the-fly relative to the top-left corner of its trigger, or
// for the root menu, the top-left corner of the page.
//
// menu[menuNumber][itemNumber] = new Item('Text', 'URL', 'link type', length of menu item,
//  additional spacing to next menu item, number of target menu to popout);
//
// If no target menu (popout) is desired, set it to 0. Likewise, if your site does not use
// frames, pass an empty string as a frame target. The 'colItem' function call in the 'Reopen'
// sample menu is an example constructor, see below in the 'Optional Code' section.
//
// Something that needs explaining - the Vertical Menu setup. You can see most menus below
// are 'true', that is they are vertical, except for the first root menu. The 'length' and
// 'width' of an item depends on its orientation -- length is how long the item runs for in
// the direction of the menu, and width is the lateral dimension of the menu. Just look at
// the examples and tweak the numbers, they'll make sense eventually :).
//
// Something else - the 'link type'. Introduced in v2.0, it was originally the name of a
// target frame. Now, you specify an empty string '' to open the URL in the current window,
// 'js:' to specify a JavaScript function, or a valid reference to a window/frame, e.g.
// 'top.leftFrame' or 'parent.popupWin'. Thanks to Martin J. Cole for suggesting the syntax!

var menu = new Array();

// Default colours passed to most menu constructors (just passed to functions, not
// a global variable - makes things easier to change later in bulk).
var defOver = '#080E5C'; 
var defBack = '#31458C';

// Default 'length' of menu items - item height if menu is vertical, width if horizontal.
var defLen = 85;


// Menu 0 is the special, 'root' menu from which everything else arises and is positioned.
// menu[menuNumber][itemNumber] = new Item('Text', 'URL', 'link type', length of menu item,
//  additional spacing to next menu item, number of target menu to popout);
menu[0] = new Array();         //109, 100, 15, 0  //61,80,15,0
menu[0][0] = new Menu(false, '', 0, 85, 17, 1, defOver, defBack, '', 'itemText');
menu[0][1] = new Item('&nbsp;&nbsp;&nbsp;&nbsp;Home &nbsp;', 'home.html', '', 59, 0, 0);
menu[0][2] = new Item('&nbsp;&nbsp;&nbsp;&nbsp;System Access &nbsp;', 'systemAccess.html', '', 116, 0, 0);
menu[0][3] = new Item('&nbsp;&nbsp;&nbsp;&nbsp;Resources &nbsp;', 'resources.html', '', 90, 0, 10);
menu[0][4] = new Item('&nbsp;&nbsp;&nbsp;&nbsp;Contacts &nbsp;', 'contact.html', '', 88, 0, 0);

//System Access SubMenu (1)
//menu[1] = new Array();
//menu[1][0] = new Menu(true, '', 0, 15, 96, 3, '#5F72B5', '#080E5C', '', 'itemText2');
//menu[1][1] = new Item('&nbsp; ERA Prod', '#', '', 20, 0, 0);
//menu[1][2] = new Item('&nbsp; Logon Request', '#', '', 20, 0, 0);

//Virtual Tour SubMenu (2)
//menu[2] = new Array();
//menu[2][0] = new Menu(true, '', 0, 15, 74, 3, '#5F72B5', '#080E5C', '', 'itemText2');
//menu[2][1] = new Item('&nbsp; ERA Tour', '#', '', 20, 0, 0);
//menu[2][2] = new Item('&nbsp; ERA Unit', '#', '', 20, 0, 0);
//menu[2][3] = new Item('&nbsp; ERA Reg', '#', '', 20, 0, 0);

//Resources SubMenu (10)
menu[10] = new Array();
menu[10][0] = new Menu(true, '', 0, 17, 118, 3, '#475E9F', '#080E5C', '', 'itemText2');
menu[10][1] = new Item('&nbsp; F.A.Q.', 'resources_faq.html', '', 20, 0, 0);
menu[10][2] = new Item('&nbsp; RF Virtual Tour', 'javascript:launchFlash2()', '', 20, 0, 0);
menu[10][3] = new Item('&nbsp; Training', 'training.html', '', 20, 0, 0);
menu[10][4] = new Item('&nbsp; ERA_Listserv', 'news_listserv.html', '', 20, 0, 0);

//News SubMenu (11)
//menu[11] = new Array();
//menu[11][0] = new Menu(true, '', 0, 17, 143, 3, '#475E9F', '#080E5C', '', 'itemText2');
//menu[11][1] = new Item('&nbsp; News/Announcements', 'news_newsandann.html', '', 20, 0, 0);
//menu[11][2] = new Item('&nbsp; ERA Listserv Request', 'news_listserv.html', '', 20, 0, 0);

//Feedback SubMenu (12)
//menu[12] = new Array();
//menu[12][0] = new Menu(true, '', 0, 15, 135, 3, '#5F72B5', '#080E5C', '', 'itemText2');
//menu[12][1] = new Item('&nbsp; Website Feedback', 'feedback_website.html', '', 20, 0, 0);
//menu[12][2] = new Item('&nbsp; ERA System Feedback', 'feedback_ERAsystem.html', '', 20, 0, 0);

//menu[0][5] = new Item('&nbsp; IU', 'window.open("http://www.indiana.edu")', 'js:', 20, 10, 0);

// menu[menuNumber][0] = new Menu(Vertical menu? (true/false), 'popout indicator', left, top,
// width, padding, 'hover colour', 'background colour', 'border stylesheet', 'text stylesheet');

// Reopen menu (you don't have to number them sequentially).
// This is across but not down... a horizontal popout with crazy stylesheets & little padding...
// These items are lengthier than normal, and have extra spacing due to the fancy borders.

// Here, we handle the onLoad and onResize events. If you are combining this script with
// other scripts that use these events, shift these declarations to the BODY tag.

window.onload = createMenus;
window.onresize = resizeHandler;

// *** OPTIONAL CODE FROM HERE DOWN ***

// This handles the window resize bug in NS4, and optionally centres your menus. I suggest
// leaving this here as otherwise when you resize NS4 horizontally menus are hidden.

var popOldWidth = window.innerWidth;
function resizeHandler()
{
 // If no menus have been created, nothing to do here...
 if (!menu[0][0].ref) return;
 if (isNS4 && popOldWidth != window.innerWidth) location.reload()

 // Uncomment these next lines to *** CENTRE/RIGHT ALIGN YOUR MENU ***
 // You must also uncomment the resizeHandler() call at the end of createMenus() above.
 // Edit this expression to anything you want -- note the menu width is hard-coded :).

 //var winWidth = (document.all ? document.body.clientWidth : window.innerWidth)
 //menu[0][0].ref.left = (winWidth / 2) - 100;
 
 // You can extend this code any way you want. Each menu or item has a 'ref' property that
 // is a reference to its style object, so you can move/resize pretty much anything. Go crazy!
}

// Optional 'coloured item' object you can add to your menu array. Delete this if you aren't
// using it, it's not necessary.

// You can alter most constructors, shifting properties between the default Menu() and Item()
// constructors, this is just an example. I built simple polymorphism into the menus beginning
// with v2.1 by nesting with()'s, just make sure everything gets included at least once
// somewhere. If in doubt, the script uses item properties over menu properties as they're more
// specific. Good luck!
function colItem(text, href, type, length, spacing, overCol, backCol, target)
{
 this.text = text;
 this.href = href;
 this.type = type;
 this.length = length;
 this.spacing = spacing;
 this.overCol = overCol;
 this.backCol = backCol;
 // If you want, add borderClass and textClass in here too. Make sure to add them as
 // parameter to this function above! You can add most parameters of the 'menu' object
 // used in writing menus to the document, such as popout indicators if you want.
 // Alternatively, it could be simpler to just use a bit of JS: menu[x][y].popInd = '...';
 // before creating the menus.
 this.target = target;
 this.ref = null;
}

//-----------------------THE FOLLOWING OPENS A NEW WINDOW FRAME!!!!--------------------
//Open a New Window
function openWindow(page) {
   winStats='toolbar=yes,location=yes,directories=yes,menubar=yes,scrollbars=yes,width=600,height=450,resizable=yes'
   if (navigator.appName.indexOf("Microsoft")>=0) {
      winStats+=',left=10,top=25'
    }else{
      winStats+=',screenX=10,screenY=25'
    }
   floater=window.open(page,"",winStats)
   floater.focus()    
}
//-----------------------THE FOLLOWING OPENS A NEW Modified WINDOW FRAME!!!!--------------------
//Open a New Modified Window
function openModWindow(page) {
   winStats='toolbar=no,location=no,directories=no,menubar=no,scrollbars=yes,width=700,height=550,resizable=no'
   if (navigator.appName.indexOf("Microsoft")>=0) {
      winStats+=',left=10,top=25'
    }else{
      winStats+=',screenX=10,screenY=25'
    }
   floater=window.open(page,"",winStats)
   floater.focus()    
}
//-----------------------THE FOLLOWING OPENS A NEW Modified Large WINDOW FRAME!!!!--------------------
//Open a New Mod Window Large
function openModLWindow(page) {
   winStats='toolbar=no,location=no,directories=no,menubar=no,scrollbars=yes,width=800,height=600,resizable=yes'
   if (navigator.appName.indexOf("Microsoft")>=0) {
      winStats+=',left=10,top=25'
    }else{
      winStats+=',screenX=10,screenY=25'
    }
   floater=window.open(page,"",winStats)
   floater.focus()  
}
//-----------------------THE FOLLOWING OPENS A NEW Modified Large2 WINDOW FRAME!!!!--------------------
//Open a New Mod Window Large2
function openModL2Window(page) {
   winStats='toolbar=no,location=no,directories=no,menubar=no,scrollbars=yes,width=900,height=600,resizable=yes'
   if (navigator.appName.indexOf("Microsoft")>=0) {
      winStats+=',left=10,top=25'
    }else{
      winStats+=',screenX=10,screenY=25'
    }
   floater=window.open(page,"",winStats)
   floater.focus()  
}
//-----------------------THE FOLLOWING OPENS A NEW Modified Full Screen WINDOW FRAME!!!!--------------------
//Open a New Mod Window Full Screen
function openModFSWindow(page) {
   winStats='toolbar=no,location=no,directories=no,menubar=no,scrollbars=yes,width=1100,height=600,resizable=yes'
   if (navigator.appName.indexOf("Microsoft")>=0) {
      winStats+=',left=10,top=25'
    }else{
      winStats+=',screenX=10,screenY=25'
    }
   floater=window.open(page,"",winStats)
   floater.focus()  
}
//-----------------------THE FOLLOWING OPENS An Archived News NEW WINDOW FRAME!!!!--------------------
//Open a Archived News New Window
function openArchiveWindow(page) {
   winStats='toolbar=no,location=no,directories=no,menubar=no,scrollbars=no,width=800,height=575,resizable=yes'
   if (navigator.appName.indexOf("Microsoft")>=0) {
      winStats+=',left=100,top=25'
    }else{
      winStats+=',screenX=100,screenY=25'
    }
   floater=window.open(page,"",winStats)
   floater.focus()    
}
//---------------------THE FOLLOWING GETS THE CURRENT DATE AND THE LAST DATE MODIFIED--------
//Last Modified date routine
function lastModified() {
   //-- Returns date this page was last modified.
   var modiDate=new Date(document.lastModified)
   var showAs=modiDate.getMonth()+1+"/"+modiDate.getDate()
   showAs+="/"+modiDate.getYear() 
   return showAs
}

//Get today's date
function todaysDate() {
   //-- Returns today's date.
   var verboseDate=new Date()
   var parsedDate=verboseDate.getMonth()+1+"/"+verboseDate.getDate()
   parsedDate+="/"+verboseDate.getYear() 
   return parsedDate
}