/*
external js file for top main navigation and quick access
$Source: /usr/cvs/eMB/Clickstream_DCVD/js/nav2_nav3.js,v $
$Revision: 1.1 $
Check-In $Date: 2002/10/08 10:14:32 $
*/
var arraysReady = false;
// mainnavi
var defaultHeight = 21; // default WhiteLayer-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;
// QuickAccess
var lastActiveQaTab = -1; // flag to avoid senseless function calls
var numberOfQaTabs;
var qasubheight = 0;
var qaLevel1Height = 16;
var qaStartX = 0;
var qaOverAllWidth = 300; // for qa 1st level highlight in ns4.x
var resetQuickAccess = true; // flag for idle handler so that showQuickAccess is just called first time
var lockQASearch = false; // flag to lock QuickAccess when in focus

// sets coordinates for the mousemove-Event-handlers
function setupCoordsAndArrays(){
	if (bNav3InPage){
  	mainNavigationLayer =	 new eMBLayer( "mnv" );
  	mnSecondLevelBgLayer = new eMBLayer( "mnsub00" );		
  	whiteLayer =					 new eMBLayer( "whiteNavLayer" );
  	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] );
	}
	if (bNav2InPage){
    qaHighlightLayer =	new eMBLayer( "qahighlight" );
  	qaBgLayer =					new eMBLayer( "qabg" );
  	qaBgTabLayer =			new eMBLayer( "qabgtab" );
  	qaLayer =						new eMBLayer( "qatab" );
		allQuickAccessTabsObjects = new Array( allQuickAccessTabs.length );
		for (var i=0; i<allQuickAccessTabs.length; i++) allQuickAccessTabsObjects[i] = new eMBLayer( allQuickAccessTabs[i] );
		allQuickAccessLayersObjects = new Array( allQuickAccessLayers.length );
		for (var i=0; i<allQuickAccessLayers.length; i++) allQuickAccessLayersObjects[i] = new eMBLayer( allQuickAccessLayers[i] );
	}
	mainnaviX = mainNavigationLayer.getX(); // x-position of mainnavi-layer
	mainnaviY = mainNavigationLayer.getY(); // y-position of mainnavi-layer
	mnMaxX = 770; // right x-border of the mainnavi-layer
}
// initializes main menu postions of first level, background, white 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 = -4 ;
				if (NS && allMenu1LayersObjects[i].isObject()) allMenu1LayersObjects[i].object.document.images[0].src = sUriPrefix + "img/1pix.gif";
				else if (document.images["nav3subedge"+i]) document.images["nav3subedge"+i].src = sUriPrefix + "img/1pix.gif";
		 }
		 allMenu1LayersObjects[i].setX( secondLevelXposition );
	} 
	sumOfWidthes = allNavLayerObjects[allNavLayerObjects.length-1].getX() + allNavLayerObjects[allNavLayerObjects.length-1].getWidth();
	setupWhiteLayer(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);
		}
	}
}
function setQaTabPositions(){
	if (!bNav2InPage) return true;
	if (IE4) setupQaTabWidthesForIE4();
	var currentX = qaOverAllWidth;
	for (var i=allQuickAccessTabsObjects.length-1; i>=0; i--){
		currentX -= allQuickAccessTabsObjects[i].getWidth();
		allQuickAccessTabsObjects[i].setX( currentX );
		allQuickAccessTabsObjects[i].show();
	}
	qaBgLayer.setX( currentX );
	qaBgTabLayer.setX( currentX + 1 );
	qaBgLayer.setSize( qaOverAllWidth-1 - currentX, 15 );
	qaBgTabLayer.setSize( qaOverAllWidth - currentX - 2 , 1 ); // "-2" for 'rounded' qa-corners
	qaStartX = currentX;
	if (NS) qaLayer.setSize( qaOverAllWidth, qaLevel1Height );
  else if ( MAC && MS ) qaLayer.object.style.clip = "rect( 0px "+qaOverAllWidth+"px "+qaLevel1Height+"px 0px )";
}

// positioning the white tab for highlightning the first level of main navigation			
// called by onmouseover on tab element
function setupWhiteLayer(activeTabLayer){
	if (activeTabLayer==0) { whiteLayer.hide(); return true; } // needed if screen has no default tab active
	if ((activeTab==0) && (activeTabLayer!=0)){ whiteLayer.show(); } // needed if screen has no default tab active
	whiteLayer.setX( allNavLayerObjects[activeTabLayer-1].getX() );
	whiteLayer.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;
		}
	}
}
// workaround just for IE4: sets initial default widthes for first level quickaccess tabs
// just called on initialisation	
function setupQaTabWidthesForIE4(){
	if (!IE4) return;
	var w = 0;
	for (i=0; i<allQuickAccessTabsObjects.length; i++){
		var d = allQuickAccessTabsObjects[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){
		setupWhiteLayer(picNum); // highlight white 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];
			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( !(coordX < 470-gmBonus || coordX > mnMaxX+gmBonus || coordY < 0 || coordY > qasubheight+4+gmBonus) ) showQuickAccessFlag=false; // check quick access	
	if (showMenuFlag==true) showMenu(""); // execute showMenu
	if (showQuickAccessFlag==true && resetQuickAccess==true) {
	  if (!lockQASearch) showQuickAccess( -1 ); // close QuickAccess only when no focus on Search-Field
	  //showQuickAccess( -1 ); // close QuickAccess
	}
}
// 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;	
	}
}
// activate tab in QuickAccess
function activateQuickAccessTab( activeQaTab, show ){
	if ( activeQaTab >= 0 ) {
		if (show==true){
			if (NS) qaLayer.setSize( qaOverAllWidth, 100 );
      else if ( MAC && MS ) qaLayer.object.style.clip = "rect( 0px "+qaOverAllWidth+"px 100px 0px )";
			
			qaHighlightLayer.setX( allQuickAccessTabsObjects[activeQaTab].getX() );
			qaHighlightLayer.setSize( allQuickAccessTabsObjects[activeQaTab].getWidth(), allQuickAccessTabsObjects[activeQaTab].getHeight() );
			
			qaBgLayer.setBgColor("#e4e4e4"); // this layer	makes all tabs which are NOT shown to darker gray				
			qaHighlightLayer.show();
			if ( DOM && !OP && !MS) setTimeout("changeQaTabArrow("+ activeQaTab +", true )", 1); // needed for NS6 to avoid flicker
			else changeQaTabArrow( activeQaTab, true );
			if ( activeQaTab!=0 ) changeQaTabLine( activeQaTab, true );
		} else {
			if (NS) qaLayer.setSize( qaOverAllWidth, qaLevel1Height );
      else if ( MAC && MS ) qaLayer.object.style.clip = "rect( 0px "+qaOverAllWidth+"px "+qaLevel1Height+"px 0px )";
			qaHighlightLayer.hide();
			qaBgLayer.setBgColor("#f0f0f0");
			for (var i=0; i<numberOfQaTabs; i++){
				if (DOM && !OP && !MS) setTimeout("changeQaTabArrow("+ i +", false )", 1); // needed for NS6 to avoid flicker
				else changeQaTabArrow( i , false );
				if ( i!=0 ) changeQaTabLine( i , false ); // needed for NS6 to avoid flicker
			}
		}
	}
}
// changes qa level one lines IF NESSESARY
function changeQaTabLine( nr, on ){
	var imageObject = null;
	if (NS){
		if ( !allQuickAccessTabsObjects[nr].isObject() ) return true;
		imageObject = allQuickAccessTabsObjects[nr].object.document.images[0];
	} else imageObject = document.images["qaline0"+nr];
	if (imageObject && imageObject.src.search("1pix"+((!on)?"":"_gray_c1")+".gif")>=0) 
		imageObject.src = sUriPrefix + "img/"+(on?"1pix":"1pix_gray_c1")+".gif";
}

// changes qa level one arrows IF NESSESARY
function changeQaTabArrow( nr, on ){
	var imageObject = null;
	if (NS){
		if (!allQuickAccessTabsObjects[nr].isObject() ) return true;
		imageObject = allQuickAccessTabsObjects[nr].object.document.images[1];
	} else if (MS || DOM) imageObject = document.images["qaarrow0"+nr];
	if (imageObject && imageObject.src.search("quickacc_o"+((!on)?"n":"ff")+".gif")>=0)
    imageObject.src = sUriPrefix + "img/nav/quickacc_o"+((on)?"n":"ff")+".gif";
}
// showQuickAccess is called when rollover/click on quickaccesstabs is performed
// qaLayerNum is the number of the Layer which has to be shown
// qaLayerNum is empty if called by handlemove/MShandlemove handler
function showQuickAccess( qaLayerNum ) {
	if (!bNav2InPage) return true;
	if (!arraysReady) setupCoordsAndArrays();
	if (lastActiveQaTab==qaLayerNum) return true;
	// after first time calling showQuickAccess resetQuickAccess is false, 
	// so an showQuickAccess(-1) call (made by handlemove/MShandlemove handler) will just one time lead to an complete execution of showQuickAccess
	if ( (resetQuickAccess == false) && (qaLayerNum==-1) ) { 
		return true;	
	} else {
		// this reset to true is always executed if an call with an parameter other than "" is executed
		resetQuickAccess = true;
	}
 	for (i=0; i<allQuickAccessLayersObjects.length; i++) {	
		if ( i != qaLayerNum) {
			allQuickAccessLayersObjects[i].hide();
			qasubheight = 0;
		}	
	}
  activateQuickAccessTab(0,false);// first parameter doesn't matter, if 2nd is "false"
	if (qaLayerNum==-1){
    lastActiveQaTab=qaLayerNum;
		resetQuickAccess = false;
		return true;
	}
	activateQuickAccessTab(qaLayerNum,true);	
 	var qaLayerObject = allQuickAccessLayersObjects[qaLayerNum];
	if (qaLayerObject.isObject() && qaLayerNum>=0 && qaLayerNum < numberOfQaTabs) {		 
		qaLayerObject.show();
		qasubheight = qaLayerObject.getHeight()+qaLayerObject.getY();
	}
  lastActiveQaTab=qaLayerNum;	
}

// 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
	setQaTabPositions(); // initialize quick access
	arraysReady = true;
}
// calls initialisation() using a timeout (needed for NS4), fixes slow menu initialisation on NS4
function init(){
	setTimeout("initialisation()", OP ? 1000 : 1 );
}