var arraysReady = false;

// mainnavi
var defaultHeight = 21; // default blueLayer-Height for NS4, only NS4 needs this 
var sumOfWidthes = 0; // sum of width of first level main navigation 
var resetMainMenu = true; // flag for idle handler so that showMenu is just called first time
// mainnavi & quickAccess
var mainnaviX, mainnaviY, mnMaxX; // coordinates for mousemove-eventhandler
var extremeGmBonus = 10;

// sets coordinates for the mousemove-Event-handlers
function setupCoordsAndArrays(){
	if (bNav3InPage){
  	mainNavigationLayer =	 new eMBLayer( "mBox" );
  	mnSecondLevelBgLayer = 	 new eMBLayer( "mnsub00" );		
		blueLayer =    	 new eMBLayer( "blueNavLayer" );
  	naviMainUnderLine =		 new eMBLayer( "mnul" );
		allNavLayerObjects = new Array( allNavLayer.length );
		for (var i=0; i<allNavLayer.length; i++) allNavLayerObjects[i] = new eMBLayer( allNavLayer[i] );
		allMenu1LayersObjects = new Array( allMenu1Layers.length );
		for (var i=0; i<allMenu1Layers.length; i++) allMenu1LayersObjects[i] = new eMBLayer( allMenu1Layers[i] );
	}


	mainnaviX = mainNavigationLayer.getX(); // x-position of mainnavi-layer
	mainnaviY = mainNavigationLayer.getY(); // y-position of mainnavi-layer
	mnMaxX = 650; // right x-border of the mainnavi-layer

}

// initializes main menu postions of first level, background, blue highlight layer and line beyond

// is called once by onload

function setMenuLayerPositions(){
	if (!bNav3InPage) return true; 

//	if (IE4) setupNavLayerWidthesForIE4(); // padding patch, just for IE4

	for (i=1; i < allNavLayer.length; i++){
		 var currentXPosition = allNavLayerObjects[i-1].getX() + allNavLayerObjects[i-1].getWidth();
		 allNavLayerObjects[i].setX( currentXPosition );
		 var secondLevelXposition;
		 if ( (currentXPosition + allNavLayerObjects[i].getWidth()) > allMenu1LayersObjects[i].getWidth() ){
			 secondLevelXposition = currentXPosition + allNavLayerObjects[i].getWidth() - allMenu1LayersObjects[i].getWidth();

		 }
		 else{
			 secondLevelXposition = 0 ;
				if (NS && allMenu1LayersObjects[i].isObject()) allMenu1LayersObjects[i].object.document.images[0].src = "inc/img/pxl.gif";
				else if (document.images["nav3subedge"+i]) document.images["nav3subedge"+i].src = "inc/img/pxl.gif";
		 }
		 allMenu1LayersObjects[i].setX( secondLevelXposition );
	} 

	sumOfWidthes = allNavLayerObjects[allNavLayerObjects.length-1].getX() + allNavLayerObjects[allNavLayerObjects.length-1].getWidth();
	setupblueLayer(activeTab);
	naviMainUnderLine.setSize ( sumOfWidthes, 1 );
	mainNavigationLayer.show();

	// fix for first time loading NS4 (collapsing top navigation)

	if (document.layers){ /* may cause Problems, if there's only 1 topic in the topnavigation */
		if ( allNavLayerObjects[allNavLayerObjects.length-1].getX()< 1 ){
			DHTML_init(); 
			setTimeout("setMenuLayerPositions()", 100);
		}
	}
}



// positioning the white tab for highlightning the first level of main navigation			
// called by onmouseover on tab element
function setupblueLayer(activeTabLayer){
	if (activeTabLayer==0) { blueLayer.hide(); return true; } // needed if screen has no default tab active
	if ((activeTab==0) && (activeTabLayer!=0)){ blueLayer.show(); } // needed if screen has no default tab active
	blueLayer.setX( allNavLayerObjects[activeTabLayer-1].getX() );
	blueLayer.setSize( allNavLayerObjects[activeTabLayer-1].getWidth(), defaultHeight );	
}

// workaround just for IE4: sets initial default widthes for first level tabs
// just called on initialisation	
function setupNavLayerWidthesForIE4(){
	if (!IE4) return;
	var w = 0;
	for (i=0; i<allNavLayerObjects.length; i++){
		var d = allNavLayerObjects[i].object;
		if ( d ){
			w = d.children[0].clientWidth;
			d.style.pixelWidth = w;
		}
	}
	for (i=0; i<allMenu1LayersObjects.length; i++){
		var d = allMenu1LayersObjects[i].object;
		if ( d ){
			w = d.children[0].clientWidth;
			d.style.pixelWidth = w;
		}
	}
}



// central function for main navigation controling
// called by eventhandler and directly onmouseover-events by html-object
// called also on initizialisation
// take care: showMenu ist called on idle state all of the time by handleMove() or MShandleMove() eventhandler
function showMenu(menu,picNum) {

	if (!bNav3InPage) return true;
	// if menu="" then call comes from idle handler
	// if resetMainMenu == false then showMenu already had been called by idle handler successfully
	if (!arraysReady) setupCoordsAndArrays();
	if ((resetMainMenu == false) && (menu=='')) {
		return true;
	} else {
		resetMainMenu = true; // set after first time called
	}
	for (i=0; i<allMenu1LayersObjects.length; i++) {
			allMenu1LayersObjects[i].hide(); // hide all menus
	}
	if (menu!=mnSecondLevelBgLayer.id && menu!=""){
		var menuLayer = new eMBLayer( menu );
		menuLayer.show();	// show level two menu layer
	}
	if (picNum != null){
		setupblueLayer(picNum); // highlight blue tab
	}

	// switch back to default main navigation level 2 submenu
	// activeSubNavName and activeTab have to be set in header of html-file
	if (menu=="") {
		if (!isNaN(activeTab) && (activeSubNavName !="")) {
			showMenu(activeSubNavName,activeTab);
		}	
		resetMainMenu = false;	
	}
}

// non-MS event handler for mouse moves
// calls showmenu without parametes on mouseout
// calls showQuickAccess without parametes on mouseout

var oldCoordX, oldCoordY;

function handleMove(ev) {
	var showMenuFlag = true;
	var showQuickAccessFlag = true;
	var eventObject = null;
	var gmBonus = 3;
	var coordX, coordY;
	if (!MS) eventObject=ev; // define an unified event-object for all browsers
	else eventObject = window.event;
	if (OP || MS){
		coordX = eventObject.clientX; // coordinates of the mousepointer, when event was fired
		coordY = eventObject.clientY;
		if (MS){
			if (IE6) // document.body.scrollTop no longer supported in IE6 (now scrollTop is part of html-object)
				// var documentBody = document.getElementsByTagName("html")[0];
				var documentBody = document.body;
			else
				var documentBody = document.body;
			coordX = coordX + documentBody.scrollLeft; // correct mouse-coords with possible scrolloffset for MS
			coordY = coordY + documentBody.scrollTop;
		}

	} else {
		coordX = eventObject.pageX;
		coordY = eventObject.pageY;
	}

	if (oldCoordX==coordX && oldCoordY==coordY) return true;

	else {
		oldCoordX=coordX;
		oldCoordY=coordY;
	}

	if( !(coordX < mainnaviX || coordX > mainnaviX+sumOfWidthes || coordY < mainnaviY || coordY > mainnaviY+20)) showMenuFlag=false; // check first level

		else if( !(coordX < mainnaviX || coordX > mnMaxX || coordY <= mainnaviY+20 || coordY > mainnaviY+20+20+extremeGmBonus)) showMenuFlag=false; // check second level



	if (showMenuFlag==true) showMenu(""); // execute showMenu
}

// initializing event handling for catching mousemove-events
// this function is responsible for recognizing mouse-outs
function Event_init() {
	if(!MS) {
		if (DOM && !OP) window.onunload=Event_quit; // for NS6
		else if (NS) document.captureEvents(Event.MOUSEMOVE);
		document.onmousemove=handleMove;		
	}

	else if ( !IE4 && !MAC ) document.getElementsByTagName("html")[0].onmousemove=handleMove;
  else document.all.tags("body")[0].onmousemove=handleMove;

}

// deactivate event-handler of site on unload. For NS6 to avoid senseless errorreports

function Event_quit(ev){

	if (DOM){
    document.getElementsByTagName("body")[0].removeEventListener("mousemove", handleMove, true);
		document.onmousemove=null;	
	}

}

// init has to be called by every html-page which has an top navigation and QuickAccess
// init is called onload of the body tag

function initialisation() {
	setupCoordsAndArrays();
	setMenuLayerPositions(); // building layout of main menu and displaying
	showMenu(activeSubNavName,activeTab); // initialize submenu (setting right white layer and initial second level

	Event_init(); // initialize event-handling for main menu AND quick access
	arraysReady = true;

}

// calls initialisation() using a timeout (needed for NS4), fixes slow menu initialisation on NS4

function init(){
initialisation()
}