// *** CROSS-BROWSER COMPATIBILITY ***

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);
} 


// *** 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: eval(type + '.location.href = "' + href + '"');
  }
 }

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


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][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++) 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!
   var w = (isVert ? width : length);
   var h = (isVert ? length : width);

   // 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 a spacer table must be added 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 ? '<table width="' + (w - 8) + '" border="0" cellpadding="0" ' +
    'cellspacing="0"><tr><td height="' + (h - 8) + '"></td></tr></table>' : '') + 
    '<layer left="' + pad + '" top="' + pad + '" width="' + (w - pad) + '" height="' +
     (h - pad) + '"><a class="' + textClass + '" href="javascript:void(0)">' + 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 + '">' + text + '</div>';

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

   // Move next item position down or across by this item's length and additional spacing.
   // Add or subtract one for partial solution to NS6 border problem.
   var shrink = (isDOM && !document.all ? -1 : 1)
   if (isVert) itemY += length + spacing - shrink;
   else itemX += length + spacing - shrink;

  // 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">' + 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');

  // 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.
var defOver = '#666666', defBack = '#999999';

// Default 'length' of menu items - item height if menu is vertical, width if horizontal.
var defLen = 25;


// Menu 0 is the special, 'root' menu from which everything else arises and is positioned.
menu[0] = new Array();
// A non-vertical menu, different coloured menu with no popout indicator, background or border.
// *** MOVE THE MENU AROUND HERE, SEE BELOW FOR CENTRING FUNCTION ***
// It's positioned at (x = 5, y = 0) and is 17px high now, with 0px padding.
menu[0][0] = new Menu(false, '', 0, 0, 20, 0, '#cccccc', '#ffffff', 'menuNoBorder', 'itemText');
// Notice how the targets are all set to nonzero values...
menu[0][1] = new Item('<a href="/CHIC/home.asp" onMouseOut="MM_swapImgRestore()" onMouseOver="MM_swapImage(\'home\',\'\',\'/images/navbar/home_over.gif\',1)"><img name="home" border="0" src="/images/navbar/home_off.gif" width="148" height="20"></a>', '#', '', 149, 0, 1);
menu[0][2] = new Item('<a href="/symptoms/default.asp" onMouseOut="MM_swapImgRestore()" onMouseOver="MM_swapImage(\'symp\',\'\',\'/images/navbar/symp_over.gif\',1)"><img name="symp" border="0" src="/images/navbar/symp_off.gif" width="124" height="20"></a>', '#', '', 125, 0, 2);
menu[0][3] = new Item('<a href="/factsheets/default.asp" onMouseOut="MM_swapImgRestore()" onMouseOver="MM_swapImage(\'fact\',\'\',\'/images/navbar/fact_over.gif\',1)"><img name="fact" border="0" src="/images/navbar/fact_off.gif" width="124" height="20"></a>', '#', '', 125, 0, 3);
menu[0][4] = new Item('<a href="/campaigns/default.asp" onMouseOut="MM_swapImgRestore()" onMouseOver="MM_swapImage(\'camp\',\'\',\'/images/navbar/camp_over.gif\',1)"><img name="camp" border="0" src="/images/navbar/camp_off.gif" width="124" height="20"></a>', '#', '', 125, 0, 4);
menu[0][5] = new Item('<a href="/press/default.asp" onMouseOut="MM_swapImgRestore()" onMouseOver="MM_swapImage(\'press\',\'\',\'/images/navbar/press_over.gif\',1)"><img name="press" border="0" src="/images/navbar/press_off.gif" width="124" height="20"></a>', '#', '', 125, 0, 5);
menu[0][6] = new Item('<a href="/safety/default.asp" onMouseOut="MM_swapImgRestore()" onMouseOver="MM_swapImage(\'safe\',\'\',\'/images/navbar/safe_over.gif\',1)"><img name="safe" border="0" src="/images/navbar/safe_off.gif" width="124" height="20"></a>', '#', '', 125, 0, 6);


// CHIC Home Menu
menu[1] = new Array();
menu[1][0] = new Menu(true, '&gt;', 0, 22, 80, 3, defOver, defBack, 'itemBorder', 'itemText');


// Symptoms Finder menu.
menu[2] = new Array();
menu[2][0] = new Menu(true, '&gt;', 0, 20, 124, 4, '#ff6600', '#ff3300', 'itemBorder', 'itemText');
menu[2][1] = new Item('Skin & Scalp', '/symptoms/skin.asp', '', defLen, 0, 0);
menu[2][2] = new Item('Eye, Ear & Mouth', '/symptoms/eye.asp', '', defLen, 0, 0);
menu[2][3] = new Item('Coughs, Colds<BR>& Flu', '/symptoms/cold.asp', '', 40, 0, 0);
menu[2][4] = new Item('Allergy/Hayfever', '/symptoms/allergy.asp', '', defLen, 0, 0);
menu[2][5] = new Item('Stomach', '/symptoms/stomach.asp', '', defLen, 0, 0);
menu[2][6] = new Item('Bowels', '/symptoms/bowels.asp', '', defLen, 0, 0);
menu[2][7] = new Item('Urinary/<BR>gynaecological', '/symptoms/urinary.asp', '', 40, 0, 0);
menu[2][8] = new Item('Pain', '/symptoms/pain.asp', '', defLen, 0, 0);
menu[2][9] = new Item('Sleep, Travel<BR>& Smoking', '/symptoms/sleep.asp', '', 40, 0, 0);


// Medicine Factsheets menu
menu[3] = new Array();
menu[3][0] = new Menu(true, '&lt;', 0, 20, 124, 4, '#336699', '#003366', 'itemBorder', 'itemText');
menu[3][1] = new Item('Suggestions for Women', '/factsheets/women.asp', '', 40, 0, 0);
menu[3][2] = new Item('Suggestions for the Family with Young Children', '/factsheets/families.asp', '', 55, 0, 0);
menu[3][3] = new Item('Suggestions for Students and Young Adults', '/factsheets/students.asp', '', 55, 0, 0);
menu[3][4] = new Item('Suggestions for Older People', '/factsheets/older.asp', '', 40, 0, 0);
menu[3][5] = new Item('Travel Medicine Suggestions', '/factsheets/travel.asp', '', 40, 0, 0);


// Health Campaigns menu
menu[4] = new Array();
menu[4][0] = new Menu(true, '&gt;', 0, 20, 124, 4, '#996633', '#663300', 'itemBorder', 'itemText');
menu[4][1] = new Item('Hayfever Campaign', '/campaigns/default.asp', '', defLen, 0, 0);
menu[4][2] = new Item('Indigestion Campaign', '/campaigns/indigestion.asp', '', 40, 0, 0);
menu[4][3] = new Item('Pain & Pain Relief Campaign', '/campaigns/pain.asp', '', 40, 0, 0);
menu[4][4] = new Item('Men\'s Health<BR>Campaign', '/campaigns/menshealth.asp', '', 40, 0, 0);
menu[4][5] = new Item('Cold & Flu<BR>Campaign', '/campaigns/cold.asp', '', 40, 0, 0);
menu[4][6] = new Item('De-stress, Not Distress Campaign', '/campaigns/stress.asp', '', 40, 0, 0);
menu[4][7] = new Item('Older Campaigns', '/campaigns/other.asp', '', defLen, 0, 7);


// Press Office menu.
menu[5] = new Array();
menu[5][0] = new Menu(true, '&gt;', 0, 20, 124, 4, '#669933', '#336600', 'itemBorder', 'itemText');
menu[5][1] = new Item('Press Releases', '/press/default.asp', '', defLen, 0, 0);


// Safety Issues menu.
menu[6] = new Array();
menu[6][0] = new Menu(true, '&gt;', 0, 20, 124, 4, '#663399', '#330066', 'itemBorder', 'itemText');


// Popout Older Campaigns menu.
menu[7] = new Array();
menu[7][0] = new Menu(true, '&gt;', 123, -14, 124, 4, '#CC9966', '#996633', 'itemBorder', 'itemText');
menu[7][1] = new Item('Cold and Flu Campaigns 1998-2000', '/campaigns/other.asp', '', 55, 0, 0);

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 (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;
}


// Optional 'coloured item' object you can add to your menu array. Use to create individual
// mouseover colours for items in a menu rather than have them all the same.
// Delete this if you aren't using it, it's not necessary.
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;
}



// This is just the moving command for the example.   *** DELETE ME ***
moveRoot = new Function('with(menu[0][0].ref) left = ((parseInt(left) < 100) ? 100 : 5);');


// End Hide -->