// rollover code

if (document.images) {
	approachoff = new Image();
	approachoff.src = "/img/nav/approach_off.gif";
	solutionsoff = new Image();
	solutionsoff.src = "/img/nav/solutions_off.gif";
	servicesoff = new Image();
	servicesoff.src = "/img/nav/services_off.gif";
	productsoff = new Image();
	productsoff.src = "/img/nav/products_off.gif";
	aboutusoff = new Image();
	aboutusoff.src = "/img/nav/aboutus_off.gif";
	mastersupportoff = new Image();
	mastersupportoff.src = "/img/nav/mastersupport_off.gif";

    approachon = new Image();
	approachon.src = "/img/nav/approach_on.gif";
    solutionson = new Image();
	solutionson.src = "/img/nav/solutions_on.gif";
    serviceson = new Image();
	serviceson.src = "/img/nav/services_on.gif";
    productson = new Image();
	productson.src = "/img/nav/products_on.gif";
    aboutuson = new Image();
	aboutuson.src = "/img/nav/aboutus_on.gif";
    mastersupporton = new Image();
	mastersupporton.src = "/img/nav/mastersupport_on.gif";
                                                
}

// Function to 'activate' images.

function imgOn(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "on.src");
	}
}

// Function to 'deactivate' images.

function imgOff(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "off.src");
	}
}

// Function to create dynamic pop up window, currently set to center window on screen.

function newWindow(url, wid, hgt, scr, res, x, y) {
    if (screen) {
        widthOfScreen = screen.width
        heightOfScreen = screen.height
    }
    midX = widthOfScreen / 2
    midY = heightOfScreen / 2
    midWid = wid / 2
    midHgt = hgt / 2
    x = midX - midWid
    y = midY - midHgt
    popUpWindow = window.open(url, 'popUp', 'width='+wid+',height='+hgt+',scrollbars='+scr+',resizable='+res+',left='+x+',top='+y+'')
}

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

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

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;
// Array showing 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 for hideAllBut!
 litNow = getTree(menuNum, itemNum);
 changeCol(litNow, 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.
  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 = parseInt(thisX + menu[targetNum][0].x);
   top = parseInt(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 menu in 1/2 sec, *UNLESS* another mouseover clears the timeout!
 if ((menuNum == 0) && !menu[menuNum][itemNum].target)
  hideAllBut(0)
 else
  popTimer = setTimeout('hideAllBut(0)', 500);
}

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.
function changeCol(changeArray, isOver)
{
 // Cycle through array searching for items to change.
 for (menuCount = 0; menuCount < changeArray.length; menuCount++)
 {
  // If item number is present, change its colour.
  if (changeArray[menuCount])
  {
   newCol = isOver ? menu[menuCount][0].overCol : menu[menuCount][0].backCol;

   // Change the colours of the div/layer background.
   with (menu[menuCount][changeArray[menuCount]].ref)
   {
    if (isNS4) bgColor = newCol;
    else 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(litNow, false);
}


// *** MENU CONSTRUCTION FUNCTIONS ***


function Menu(isVert, popInd, x, y, width, 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;
 // 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, frame, length, spacing, target)
{
 this.text = text;
 this.href = href;
 this.frame = frame;
 this.length = length;
 this.spacing = spacing;
 this.target = target;
 // Reference to the object's style properties (set later).
 this.ref = null;
}

function writeMenus()
{
 if (!isDOM && !isIE4 && !isNS4) 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;

  // 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.
   // Thanks to Paul Maden (www.paulmaden.com) for helping debug this in IE4, apparently
   // the width must be a miniumum of 3 for it to work in that browser.
   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 handlers and finish div/layer.
   str += 'onMouseOver="popOver(' + currMenu + ',' + currItem + ')" onMouseOut="popOut(' +
     currMenu + ',' + currItem + ')">';

   // Add contents of item (default: table with link inside).
   // In IE/NS6+, add padding if there's a border to emulate NS4's layer padding.
   // If a target frame is specified, also add that to the <a> tag.
   str += '<table width="' + (w - 8) + '" border="0" cellspacing="0" cellpadding="' +
    (!isNS4 && borderClass ? 3 : 0) + '"><tr><td align="left" height="' + (h - 7) + '">' +
    '<a class="' + textClass + '" href="' + href + '"' +
    (frame ? ' target="' + frame + '">' : '>') + text + '</a></td>';

   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.
    if (popInd) str += '<td class="' + textClass + '" align="right">' + popInd + '</td>';
   }

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

   // Move next item position down or across by this item's length and additional spacing.
   if (isVert) itemY += length + spacing;
   else itemX += length + spacing;

  // 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...

  // In IE5+ or NS6+, create a new DIV node and add text to it...
  if (isDOM)
  {
   var newDiv = document.createElement('div');
   document.getElementsByTagName('body').item(0).appendChild(newDiv);
   newDiv.innerHTML = str;
   ref = newDiv.style;
    
   ref.position = 'absolute';
   ref.visibility = 'hidden';
  }
   
  // Insert a div tag to the end of the BODY with menu HTML in place for IE4.
  if (isIE4)
  {
   document.body.insertAdjacentHTML('beforeEnd', '<div id="menu' + currMenu + 'div" ' +
    'style="position: absolute; visibility: hidden">' + str + '</div>');
   ref = getSty('menu' + currMenu + 'div');
  }
   
  // In NS4, create a reference to a new layer and write the items to it.
  if (isNS4)
  {
   ref = new Layer(0);
   ref.document.write(str);
   ref.document.close();
  }

  // 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];
  }

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

 // Now they've all been written, position & show the root menu (others positioned later).
 with(menu[0][0])
 {
  ref.left = x;
  ref.top = y;
  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, 'mouseover 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', 'target frame', 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.
//
// 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 :).

// *** MOVE ROOT MENU AROUND HERE ***
// Menu 0 is the special, 'root' menu from which everything else arises.
// Notice how the targets are all set to nonzero values...
// The 'length' of each of these items is 40, and there is spacing of 10 to the next item.
// Most of the links are set to '#' hashes, make sure you change them to actual files.

var menu = new Array();

// Root menu.
menu[0] = new Array();
menu[0][0] = new Menu(false, '', 0, menuPos, 25, '#000000', '#000000', '', '');
menu[0][1] = new Item('<a href="/approach/" onMouseover="imgOn(\'approach\'); return true" onMouseOut="imgOff(\'approach\')"><img name="approach" src="/img/nav/approach_off.gif" width="112" height="25" border="0"></a>', '/approach/', '', 25, 87, 1);
menu[0][2] = new Item('<a href="/solutions/" onMouseover="imgOn(\'solutions\'); return true" onMouseOut="imgOff(\'solutions\')"><img name="solutions" src="/img/nav/solutions_off.gif" width="121" height="25" border="0"></a>', '/solutions/', '', 25, 96, 2);
menu[0][3] = new Item('<a href="/services/" onMouseover="imgOn(\'services\'); return true" onMouseOut="imgOff(\'services\')"><img name="services" src="/img/nav/services_off.gif" width="117" height="25" border="0"></a>', '/services/', '', 25, 92, 3);
menu[0][4] = new Item('<a href="/products/" onMouseover="imgOn(\'products\'); return true" onMouseOut="imgOff(\'products\')"><img name="products" src="/img/nav/products_off.gif" width="118" height="25" border="0"></a>', '/products/', '', 25, 93, 4);
menu[0][5] = new Item('<a href="/about_us/" onMouseover="imgOn(\'aboutus\'); return true" onMouseOut="imgOff(\'aboutus\')"><img name="aboutus" src="/img/nav/aboutus_off.gif" width="117" height="25" border="0"></a>', '/about_us/', '', 25, 92, 5);
menu[0][6] = new Item('<a href="/master_support/" onMouseover="imgOn(\'mastersupport\'); return true" onMouseOut="imgOff(\'mastersupport\')"><img name="mastersupport" src="/img/nav/mastersupport_off.gif" width="165" height="25" border="0"></a>', '/master_support/', '', 25, 100, 0);

// An example of a link with a target frame/window as well...
// menu[0][4] = new Item('&nbsp; Site', 'http://gusnz.cjb.net', '_new', 40, 10, 0);

// The File menu is positioned 0px across and 22 down from its trigger, and is 80 wide.
// All text in this menu has the stylesheet class 'item' -- see the <style> section above.
// We've passed a 'greater-than' sign '&gt;' as a popout indicator. Try an image...?

// Approach menu.

menu[1] = new Array();
menu[1][0] = new Menu(true, '<img src="/img/arrow.gif" width="8" height="7" align="absmiddle" border="0">', 10, 25, 160, '#889A62', '#5E6E3C', 'blackborder', 'subnav');
menu[1][1] = new Item('Project Management', '/approach/project_management/', '', 20, 0, 6);
menu[1][2] = new Item('Design Development', '/approach/design_development/', '', 20, 0, 7);
menu[1][3] = new Item('Product Manufacturing', '/approach/product_manufacturing/', '', 20, 0, 8);
menu[1][4] = new Item('Service', '/approach/service.php', '', 20, 0, 0);

// Solutions menu.

menu[2] = new Array();
menu[2][0] = new Menu(true, '<img src="/img/arrow.gif" width="8" height="7" align="absmiddle" border="0">', 10, 25, 165, '#889A62', '#5E6E3C', 'blackborder', 'subnav');
menu[2][1] = new Item('Water Treatment', '/solutions/water_treatment.php', '', 20, 0, 0);
menu[2][2] = new Item('Fuel & Water Storage Distribution', '/solutions/fuel_and_water_storage_distribution.php', '', 32, 0, 0);                 
menu[2][3] = new Item('Disaster Relief/<br>Emergency Response', '/solutions/disaster_relief_emergency_response.php', '', 32, 0, 0); 
menu[2][4] = new Item('Heat Transfer', '/solutions/heat_transfer.php', '', 20, 0, 0);                                           
menu[2][5] = new Item('Specialty Manufacturing', '/solutions/specialty_manufacturing.php', '', 20, 0, 0);  

// Services menu.

menu[3] = new Array();
menu[3][0] = new Menu(true, '<img src="/img/arrow.gif" width="8" height="7" align="absmiddle" border="0">', 10, 25, 170, '#889A62', '#5E6E3C', 'blackborder', 'subnav');
menu[3][1] = new Item('Parts &amp; Services', '/master_support/', '', 20, 0, 0);
menu[3][2] = new Item('Tech Support', '/services/tech_support.php', '', 20, 0, 0);
menu[3][3] = new Item('Engineering Services', '/services/engineering_services.php', '', 20, 0, 0);
menu[3][4] = new Item('ILS', '/services/ils.php', '', 20, 0, 0);
menu[3][5] = new Item('Preventative Maintenance', '/services/preventative_maintenance.php', '', 20, 0, 0);
menu[3][6] = new Item('Retrofit', '/services/retrofit.php', '', 20, 0, 0);
menu[3][7] = new Item('Spare Parts', '/services/spare_parts.php', '', 20, 0, 0);
menu[3][8] = new Item('Training', '/services/training.php', '', 20, 0, 0);

// Products menu.

menu[4] = new Array();
menu[4][0] = new Menu(true, '<img src="/img/arrow.gif" width="8" height="7" align="absmiddle" border="0">', 10, 25, 135, '#889A62', '#5E6E3C', 'blackborder', 'subnav');
menu[4][1] = new Item('LWP', '/products/lwp/', '', 20, 0, 9);
menu[4][2] = new Item('Sole Provider', '/products/mobile_water_treatment_system/', '', 20, 0, 0);
menu[4][3] = new Item('Sole ProviderII', '/products/mobile_water_treatment_system2/', '', 20, 0, 0);
menu[4][4] = new Item('ROWPU - 600gph', '/products/rowpu/', '', 20, 0, 0);
menu[4][5] = new Item('Pumps', '/products/pumps/', '', 20, 0, 0);
menu[4][6] = new Item('Heat Exchangers', '/products/heat_exchangers/', '', 20, 0, 0);
menu[4][7] = new Item('Marine Desalination', 'http://www.mecomarineoilandgas.com/products/vapor_compression/', '', 20, 0, 0);

// About Us menu.

menu[5] = new Array();
menu[5][0] = new Menu(true, '<img src="/img/arrow.gif" width="8" height="7" align="absmiddle" border="0">', 10, 25, 125, '#889A62', '#5E6E3C', 'blackborder', 'subnav');
menu[5][1] = new Item('History', '/about_us/history.php', '', 20, 0, 0);
menu[5][2] = new Item('Past Performance', '/about_us/past_performance.php', '', 20, 0, 0);
menu[5][3] = new Item('MECO in the News', '/meco_in_the_news/', '', 20, 0, 0);

// Approach > Project Management sub menu.

menu[6] = new Array();
menu[6][0] = new Menu(true, '', 159, 3, 150, '#7F7F7F', '#545454', 'blackborder', 'subnav');
menu[6][1] = new Item('', '/approach/project_management/', '', 1, 0, 0);
menu[6][2] = new Item('Project Manager', '/approach/project_management/project_manager.php', '', 20, 0, 0);
menu[6][3] = new Item('Engineering', '/approach/project_management/engineering.php', '', 20, 0, 0);
menu[6][4] = new Item('Quality Assurance', '/approach/project_management/quality_assurance.php', '', 20, 0, 0);
menu[6][5] = new Item('Materials Management', '/approach/project_management/materials_management.php', '', 20, 0, 0);
menu[6][6] = new Item('Manufacturing', '/approach/project_management/manufacturing.php', '', 20, 0, 0);

// Approach > Design Development sub menu.

menu[7] = new Array();
menu[7][0] = new Menu(true, '', 159, 3, 150, '#7F7F7F', '#545454', 'blackborder', 'subnav');
menu[7][1] = new Item('', '/approach/design_development/', '', 1, 0, 0);
menu[7][2] = new Item('Planning', '/approach/design_development/planning.php', '', 20, 0, 0);
menu[7][3] = new Item('Inputs & Outputs', '/approach/design_development/inputs_and_outputs.php', '', 20, 0, 0);
menu[7][4] = new Item('Review', '/approach/design_development/review.php', '', 20, 0, 0);
menu[7][5] = new Item('Verification', '/approach/design_development/verification.php', '', 20, 0, 0);
menu[7][6] = new Item('Control Design & Development Changes', '/approach/design_development/control_design_and_development_changes.php', '', 32, 0, 0);

// Approach > Product Manufacturing sub menu.

menu[8] = new Array();
menu[8][0] = new Menu(true, '', 159, 3, 150, '#7F7F7F', '#545454', 'blackborder', 'subnav');
menu[8][1] = new Item('', '/approach/product_manufacturing/', '', 1, 0, 0);
menu[8][2] = new Item('Facility', '/approach/product_manufacturing/facility.php', '', 20, 0, 0);
menu[8][3] = new Item('Production Personnel', '/approach/product_manufacturing/production_personnel.php', '', 20, 0, 0);
menu[8][4] = new Item('Supplier Management', '/approach/product_manufacturing/supplier_management.php', '', 20, 0, 0);
menu[8][5] = new Item('Tooling & Equipment', '/approach/product_manufacturing/tooling_and_equipment.php', '', 20, 0, 0);
menu[8][6] = new Item('Scheduling', '/approach/product_manufacturing/scheduling.php', '', 20, 0, 0);

// Products > LWP sub menu.

menu[9] = new Array();
menu[9][0] = new Menu(true, '', 134, 3, 160, '#7F7F7F', '#545454', 'blackborder', 'subnav');
menu[9][1] = new Item('', '/products/lwp/', '', 1, 0, 0);
menu[9][2] = new Item('Design Features', '/products/lwp/design_features.php', '', 20, 0, 0);
menu[9][3] = new Item('How It Works', '/products/lwp/how_it_works.php', '', 20, 0, 0);
menu[9][4] = new Item('Membrane Technology', '/products/lwp/membrane_technology.php', '', 20, 0, 0);            
menu[9][5] = new Item('Technical Specifications', 'mailto:jklie@meco.com?subject=Technical Specs for LWP', '', 20, 0, 0);  
menu[9][6] = new Item('Parts &amp; Services', '/master_support/', '', 20, 0, 0);                                 
menu[9][7] = new Item('FAQs', '/products/lwp/faqs.php', '', 20, 0, 0);                                  
menu[9][8] = new Item('LWP News', '/meco_in_the_news/', '', 20, 0, 0);     

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

// These two lines handle the window resize bug in NS4. See <body onResize="...">.
// I recommend you leave this here as otherwise when you resize NS4's width menus are hidden.

var popOldWidth = window.innerWidth;
nsResizeHandler = new Function('if (popOldWidth != window.innerWidth) location.reload()');


// This is a quick snippet that captures all clicks on the document and hides the menus
// every time you click. Use if you want.

//if (isNS4) document.captureEvents(Event.CLICK);
//document.onclick = clickHandle;

function clickHandle(evt)
{
 if (isNS4) document.routeEvent(evt);
 hideAllBut(0);
}


// This is just the moving command for the example.

//function moveRoot()
//{
// with(menu[0][0].ref) left = ((parseInt(left) < 100) ? 100 : 5);
//}