org.eclipse.help.webapp/toc.js - platform/eclipse.platform.ua - Git at Google

 /*
  * (c) Copyright IBM Corp. 2000, 2002.
  * All Rights Reserved.
  */

 // Common scripts for IE and Mozilla.

 var isMozilla = navigator.userAgent.indexOf('Mozilla') != -1 && parseInt(navigator.appVersion.substring(0,1)) >= 5;
 var isIE = navigator.userAgent.indexOf('MSIE') != -1;
 var isIE50 = navigator.userAgent.indexOf('MSIE 5.0') != -1;

 var tocTitle = "";
 var oldActive;


 // Preload images
 minus = new Image();
 minus.src = "images/minus.gif";
 plus = new Image();
 plus.src = "images/plus.gif";

 folder_img = new Image();
 folder_img.src = "images/container_obj.gif";
 topic_img = new Image();
 topic_img.src = "images/topic.gif";

 /**
  * Returns the target node of an event
  */
 function getTarget(e) {
 	var target;
   	if (isMozilla)
   		target = e.target;
   	else if (isIE)
    		target = window.event.srcElement;

 	return target;
 }

 /**
  * Returns the next tree node "down" from current one
  */
 function getNextDown(node)
 {
 	var a = getAnchorNode(node);
 	if (!a) return null;

 	// Try visible child first
 	var li = a.parentNode.parentNode;
 	var ul = getChildNode(li, "UL");
 	if (ul && ul.className == "expanded")
 		return getDescendantNode(ul, "A");

 	// Try next sibling
 	var li_sib = getNextSibling(li);
 	if (li_sib != null)
 		return getDescendantNode(li_sib, "A");

 	// Try looking to parent's sibling
 	while(li_sib == null) {
 		var ul = li.parentNode;
 		li = ul.parentNode;
 		if (li.tagName != "LI") // reached the top, nothing else to do
 			return null;

 		li_sib = getNextSibling(li);
 	}

 	// found the next down sibling
 	return getDescendantNode(li_sib, "A");
 }

 /**
  * Returns the next tree node "down" from current one
  */
 function getNextUp(node)
 {
 	var a = getAnchorNode(node);
 	if (!a) return null;

 	// Get previous sibling first
 	var li = a.parentNode.parentNode;
 	var li_sib = getPrevSibling(li);
 	if (li_sib != null) {
 		// try to get the deepest node that preceeds this current node
 		var candidate = getDescendantNode(li_sib, "A");
 		var nextDown = getNextDown(candidate);
 		while(nextDown != null && nextDown != node){
 			candidate = nextDown;
 			nextDown = getNextDown(nextDown);
 		}
 		return getDescendantNode(candidate, "A");	;
 	} else {
 		// get the parent
 		var li = li.parentNode.parentNode;
 		if (li && li.tagName == "LI")
 			return getDescendantNode(li, "A");
 		else
 			return null;
 	}
 }

 /**
  * Returns the next sibling element
  */
 function getNextSibling(node)
 {
 	var sib = node.nextSibling;
 	while (sib && sib.nodeType == 3) // text node
 		sib = sib.nextSibling;
 	return sib;
 }

 /**
  * Returns the next sibling element
  */
 function getPrevSibling(node)
 {
 	var sib = node.previousSibling;
 	while (sib && sib.nodeType == 3) // text node
 		sib = sib.previousSibling;
 	return sib;
 }


 /**
  * Returns the child node with specified tag
  */
 function getChildNode(parent, childTag)
 {
 	var list = parent.childNodes;
 	if (list == null) return null;
 	for (var i=0; i<list.length; i++)
 		if (list.item(i).tagName == childTag)
 			return list.item(i);
 	return null;
 }

 /**
  * Returns the descendat node with specified tag (depth-first searches)
  */
 function getDescendantNode(parent, childTag)
 {
 	if (parent.tagName == childTag)
 		return parent;

 	var list = parent.childNodes;
 	if (list == null) return null;
 	for (var i=0; i<list.length; i++) {
 		var child = list.item(i);
 		if(child.tagName == childTag)
 			return child;

 		child = getDescendantNode(child, childTag);
 		if (child != null)
 			return child;
 	}
 	return null;
 }


 /**
  * Returns the anchor of this click
  * NOTE: MOZILLA BUG WITH A:focus and A:active styles
  */
 function getAnchorNode(node) {

   if (node.nodeType == 3)  //"Node.TEXT_NODE")
 	return node.parentNode;
   else if (node.tagName == "A")
     return node;
   else if (node.tagName == "NOBR")
   	return node.lastChild;
   else if (node.tagName == "IMG")
   	return getChildNode(node.parentNode, "A");
   return null;
 }

 /**
  * Returns the plus/minus icon for this tree node
  */
 function getPlusMinus(node)
 {
 	if (isPlusMinus(node))
 		return node;
   	else if (node.nodeType == 3)  //"Node.TEXT_NODE")
 		return getChildNode(node.parentNode.parentNode, "IMG");
 	else if (node.tagName == "IMG")
     	return getChildNode(node.parentNode.parentNode, "IMG");
   	else if (node.tagName == "A")
     	return getChildNode(node.parentNode, "IMG");
    	else if (node.tagName == "NOBR")
   		return getChildNode(node, "IMG");

  	return null;
 }


 /**
  * Returns true when the node is the plus or minus icon
  */
 function isPlusMinus(node)
 {
 	return (node.nodeType != 3 && node.tagName == "IMG" && (node.className == "expanded" || node.className == "collapsed"));
 }

 /**
  * Collapses a tree rooted at the specified element
  */
 function collapse(node) {
   node.className = "collapsed";
   node.src = plus.src;
   // set the UL as well
   var ul = getChildNode(node.parentNode.parentNode, "UL");
   if (ul != null) ul.className = "collapsed";
 }

 /**
  * Expands a tree rooted at the specified element
  */
 function expand(node) {
   	node.className = "expanded";
   	node.src = minus.src;
   	// set the UL as well
   	var ul = getChildNode(node.parentNode.parentNode, "UL");
   	if (ul != null) ul.className = "expanded";
 }

 /**
  * Expands the nodes from root to the specified node
  */
 function expandPathTo(node)
 {
 	// when the node is a link, get the plus/minus image
 	if (node.tagName == "A")
 	{
 		var img = getChildNode(node.parentNode, "IMG")
 		if (img == null) return;
 		expandPathTo(img);
 		return;
 	}

 	if (isCollapsed(node))
 		expand(node);

 	var nobr = node.parentNode;
 	if (nobr == null) return;
 	var li = nobr.parentNode;
 	if (nobr == null) return;
 	var ul = li.parentNode;
 	if (ul == null) return;
 	li = ul.parentNode;
 	if (li == null) return;
 	nobr = getChildNode(li, "NOBR");
 	if (nobr == null) return;
 	var img = getChildNode(nobr, "IMG");
 	if (img == null) return;

 	expandPathTo(img);
 }

 /**
  * Returns true when this is an expanded tree node
  */
 function isExpanded(node) {
   return node.className == "expanded";
 }

 /**
  * Returns true when this is a collapsed tree node
  */
 function isCollapsed(node) {
   return  node.className == "collapsed";
 }

 /**
  * Highlights link
  */
 function highlightTopic(topic)
 {
 	if (isMozilla)
 		window.getSelection().removeAllRanges();

   	var a = getAnchorNode(topic);
   	if (a != null)
   	{
   	  	parent.parent.setToolbarTitle(tocTitle);
   	  	if (oldActive && oldActive != a)
   	  		oldActive.className = "";

   		oldActive = a;
   		a.className = "active";

   		//if (isIE)
   		//	a.hideFocus = "true";
   	}
 }

 /**
  * Selects a topic in the tree: expand tree and highlight it
  */
 function selectTopic(topic)
 {
 	var links = document.getElementsByTagName("a");

 	for (var i=0; i<links.length; i++)
 	{
 		if (topic == links[i].href)
 		{
 			expandPathTo(links[i]);
 			highlightTopic(links[i]);
 			scrollIntoView(links[i]);
 			return true;
 		}
 	}
 	return false;
 }

 /**
  * Scrolls the page to show the specified element
  */
 function scrollIntoView(node)
 {
 	var scroll = getVerticalScroll(node);
 	if (scroll != 0)
 		window.scrollBy(0, scroll);
 }

 /**
  * Scrolls the page to show the specified element
  */
 function getVerticalScroll(node)
 {
 	var nodeTop = node.offsetTop;
 	var nodeBottom = nodeTop + node.offsetHeight;
 	var pageTop = 0;
 	var pageBottom = 0;

 	if (isIE)
 	{
 		pageTop = document.body.scrollTop;
 		pageBottom = pageTop + document.body.clientHeight;

 	}
 	else if (isMozilla)
 	{
 		pageTop = window.pageYOffset;
 		pageBottom = pageTop + window.innerHeight - node.offsetHeight;
 	}

 	var scroll = 0;
 	if (nodeTop >= pageTop )
 	{
 		if (nodeBottom <= pageBottom)
 			scroll = 0; // already in view
 		else
 			scroll = nodeBottom - pageBottom;
 	}
 	else
 	{
 		scroll = nodeTop - pageTop;
 	}

 	return scroll;
 }

 /*
  * Currently called on IE only
  */
 function focusHandler(e)
 {
 	if (isMozilla)
 		return;

 	try{
 		if (oldActive){
 			// only focus when the element is visible
 			var scroll = getVerticalScroll(oldActive);
 			if (scroll == 0)
 				oldActive.focus();
 		}
 	}
 	catch(e){}
 }


 /**
  * display topic label in the status line on mouse over topic
  */
 function mouseMoveHandler(e) {
   var overNode = getTarget(e);
   if (!overNode) return;

   overNode = getAnchorNode(overNode);
   if (overNode == null)
    return;

   if (isMozilla)
      e.cancelBubble = false;

   window.status = overNode.title;
 }

 /**
  * handler for expanding / collapsing topic tree
  */
 function mouseClickHandler(e) {
   	var clickedNode = getTarget(e);
   	if (!clickedNode) return;

   	if (isPlusMinus(clickedNode) )
   	{
     	if (isCollapsed(clickedNode))
    			expand(clickedNode);
   		else if (isExpanded(clickedNode))
   	  		collapse(clickedNode);
   	}
   	else
   	{
   		var plus_minus = getPlusMinus(clickedNode);
   		if (plus_minus != null)
   			highlightTopic(plus_minus);
   	}

   	if (isMozilla)
   		e.cancelBubble = true;
   	else if (isIE)
   		window.event.cancelBubble = true;
 }

 /**
  * handler for expanding / collapsing topic tree
  */
 function mouseDblClickHandler(e) {

   	var clickedNode = getTarget(e);
   	if (!clickedNode) return;

   	var plus_minus = getPlusMinus(clickedNode);
   	if (plus_minus != null)
   	{
     	if (isCollapsed(plus_minus))
    			expand(plus_minus);
   		else if (isExpanded(plus_minus))
   	  		collapse(plus_minus);

   		highlightTopic(plus_minus);
   	}

   	if (isMozilla)
   		e.cancelBubble = true;
   	else if (isIE)
   		window.event.cancelBubble = true;
 }

 /**
  * Handler for key down (arrows)
  */
 function keyDownHandler(e)
 {
 	var key;
 	var altKey;
 	var shiftKey;
 	var ctrlKey;

 	if (isIE) {
 		key = window.event.keyCode;
 		altKey = window.event.altKey;
 		shiftKey = window.event.shiftKey;
 		ctrlKey = window.event.ctrlKey;
 	} else if (isMozilla) {
 		key = e.keyCode;
 		altKey = e.altKey;
 		shiftKey = e.shiftKey;
 		ctrlKey = e.ctrlKey;
 	}

 	if (key == 9 || key == 13 || altKey || shiftKey || ctrlKey ) // tab, enter or modifiers
 		return true;

 	if (isMozilla)
   		e.cancelBubble = true;
   	else if (isIE)
   		window.event.cancelBubble = true;

   	if (key == 39) { // Right arrow, expand
 		var clickedNode = getTarget(e);
   		if (!clickedNode) return;

   		var plus_minus = getPlusMinus(clickedNode);
   		if (plus_minus != null)
   		{
     		if (isCollapsed(plus_minus))
    				expand(plus_minus);

   			highlightTopic(plus_minus);
   			scrollIntoView(clickedNode);
   		}
   	} else if (key == 37) { // Left arrow,collapse
 		var clickedNode = getTarget(e);
   		if (!clickedNode) return;

   		var plus_minus = getPlusMinus(clickedNode);
   		if (plus_minus != null)
   		{
     		if (isExpanded(plus_minus))
    				collapse(plus_minus);

   			highlightTopic(plus_minus);
   			scrollIntoView(clickedNode);
   		}
   	} else if (key == 40 ) { // down arrow
   		var clickedNode = getTarget(e);
   		if (!clickedNode) return;

 		var next = getNextDown(clickedNode);
 		if (next)
 			next.focus();

   	} else if (key == 38 ) { // up arrow
   		var clickedNode = getTarget(e);
   		if (!clickedNode) return;

 		var next = getNextUp(clickedNode);
 		if (next)
 			next.focus();
   	}


   	return false;
 }

 if (isMozilla) {
   document.addEventListener('click', mouseClickHandler, true);
   document.addEventListener('dblclick', mouseDblClickHandler, true);
   document.addEventListener('mousemove', mouseMoveHandler, true);
   document.addEventListener('keydown', keyDownHandler, true);
 }
 else if (isIE){
   document.onclick = mouseClickHandler;
   document.ondblclick = mouseDblClickHandler;
   document.onmousemove = mouseMoveHandler;
   document.onkeydown = keyDownHandler;
   window.onfocus = focusHandler;
 }
	/*
	* (c) Copyright IBM Corp. 2000, 2002.
	* All Rights Reserved.
	*/

	// Common scripts for IE and Mozilla.

	var isMozilla = navigator.userAgent.indexOf('Mozilla') != -1 && parseInt(navigator.appVersion.substring(0,1)) >= 5;
	var isIE = navigator.userAgent.indexOf('MSIE') != -1;
	var isIE50 = navigator.userAgent.indexOf('MSIE 5.0') != -1;

	var tocTitle = "";
	var oldActive;


	// Preload images
	minus = new Image();
	minus.src = "images/minus.gif";
	plus = new Image();
	plus.src = "images/plus.gif";

	folder_img = new Image();
	folder_img.src = "images/container_obj.gif";
	topic_img = new Image();
	topic_img.src = "images/topic.gif";

	/**
	* Returns the target node of an event
	*/
	function getTarget(e) {
	var target;
	if (isMozilla)
	target = e.target;
	else if (isIE)
	target = window.event.srcElement;

	return target;
	}

	/**
	* Returns the next tree node "down" from current one
	*/
	function getNextDown(node)
	{
	var a = getAnchorNode(node);
	if (!a) return null;

	// Try visible child first
	var li = a.parentNode.parentNode;
	var ul = getChildNode(li, "UL");
	if (ul && ul.className == "expanded")
	return getDescendantNode(ul, "A");

	// Try next sibling
	var li_sib = getNextSibling(li);
	if (li_sib != null)
	return getDescendantNode(li_sib, "A");

	// Try looking to parent's sibling
	while(li_sib == null) {
	var ul = li.parentNode;
	li = ul.parentNode;
	if (li.tagName != "LI") // reached the top, nothing else to do
	return null;

	li_sib = getNextSibling(li);
	}

	// found the next down sibling
	return getDescendantNode(li_sib, "A");
	}

	/**
	* Returns the next tree node "down" from current one
	*/
	function getNextUp(node)
	{
	var a = getAnchorNode(node);
	if (!a) return null;

	// Get previous sibling first
	var li = a.parentNode.parentNode;
	var li_sib = getPrevSibling(li);
	if (li_sib != null) {
	// try to get the deepest node that preceeds this current node
	var candidate = getDescendantNode(li_sib, "A");
	var nextDown = getNextDown(candidate);
	while(nextDown != null && nextDown != node){
	candidate = nextDown;
	nextDown = getNextDown(nextDown);
	}
	return getDescendantNode(candidate, "A"); ;
	} else {
	// get the parent
	var li = li.parentNode.parentNode;
	if (li && li.tagName == "LI")
	return getDescendantNode(li, "A");
	else
	return null;
	}
	}

	/**
	* Returns the next sibling element
	*/
	function getNextSibling(node)
	{
	var sib = node.nextSibling;
	while (sib && sib.nodeType == 3) // text node
	sib = sib.nextSibling;
	return sib;
	}

	/**
	* Returns the next sibling element
	*/
	function getPrevSibling(node)
	{
	var sib = node.previousSibling;
	while (sib && sib.nodeType == 3) // text node
	sib = sib.previousSibling;
	return sib;
	}


	/**
	* Returns the child node with specified tag
	*/
	function getChildNode(parent, childTag)
	{
	var list = parent.childNodes;
	if (list == null) return null;
	for (var i=0; i<list.length; i++)
	if (list.item(i).tagName == childTag)
	return list.item(i);
	return null;
	}

	/**
	* Returns the descendat node with specified tag (depth-first searches)
	*/
	function getDescendantNode(parent, childTag)
	{
	if (parent.tagName == childTag)
	return parent;

	var list = parent.childNodes;
	if (list == null) return null;
	for (var i=0; i<list.length; i++) {
	var child = list.item(i);
	if(child.tagName == childTag)
	return child;

	child = getDescendantNode(child, childTag);
	if (child != null)
	return child;
	}
	return null;
	}


	/**
	* Returns the anchor of this click
	* NOTE: MOZILLA BUG WITH A:focus and A:active styles
	*/
	function getAnchorNode(node) {

	if (node.nodeType == 3) //"Node.TEXT_NODE")
	return node.parentNode;
	else if (node.tagName == "A")
	return node;
	else if (node.tagName == "NOBR")
	return node.lastChild;
	else if (node.tagName == "IMG")
	return getChildNode(node.parentNode, "A");
	return null;
	}

	/**
	* Returns the plus/minus icon for this tree node
	*/
	function getPlusMinus(node)
	{
	if (isPlusMinus(node))
	return node;
	else if (node.nodeType == 3) //"Node.TEXT_NODE")
	return getChildNode(node.parentNode.parentNode, "IMG");
	else if (node.tagName == "IMG")
	return getChildNode(node.parentNode.parentNode, "IMG");
	else if (node.tagName == "A")
	return getChildNode(node.parentNode, "IMG");
	else if (node.tagName == "NOBR")
	return getChildNode(node, "IMG");

	return null;
	}


	/**
	* Returns true when the node is the plus or minus icon
	*/
	function isPlusMinus(node)
	{
	return (node.nodeType != 3 && node.tagName == "IMG" && (node.className == "expanded" \|\| node.className == "collapsed"));
	}

	/**
	* Collapses a tree rooted at the specified element
	*/
	function collapse(node) {
	node.className = "collapsed";
	node.src = plus.src;
	// set the UL as well
	var ul = getChildNode(node.parentNode.parentNode, "UL");
	if (ul != null) ul.className = "collapsed";
	}

	/**
	* Expands a tree rooted at the specified element
	*/
	function expand(node) {
	node.className = "expanded";
	node.src = minus.src;
	// set the UL as well
	var ul = getChildNode(node.parentNode.parentNode, "UL");
	if (ul != null) ul.className = "expanded";
	}

	/**
	* Expands the nodes from root to the specified node
	*/
	function expandPathTo(node)
	{
	// when the node is a link, get the plus/minus image
	if (node.tagName == "A")
	{
	var img = getChildNode(node.parentNode, "IMG")
	if (img == null) return;
	expandPathTo(img);
	return;
	}

	if (isCollapsed(node))
	expand(node);

	var nobr = node.parentNode;
	if (nobr == null) return;
	var li = nobr.parentNode;
	if (nobr == null) return;
	var ul = li.parentNode;
	if (ul == null) return;
	li = ul.parentNode;
	if (li == null) return;
	nobr = getChildNode(li, "NOBR");
	if (nobr == null) return;
	var img = getChildNode(nobr, "IMG");
	if (img == null) return;

	expandPathTo(img);
	}

	/**
	* Returns true when this is an expanded tree node
	*/
	function isExpanded(node) {
	return node.className == "expanded";
	}

	/**
	* Returns true when this is a collapsed tree node
	*/
	function isCollapsed(node) {
	return node.className == "collapsed";
	}

	/**
	* Highlights link
	*/
	function highlightTopic(topic)
	{
	if (isMozilla)
	window.getSelection().removeAllRanges();

	var a = getAnchorNode(topic);
	if (a != null)
	{
	parent.parent.setToolbarTitle(tocTitle);
	if (oldActive && oldActive != a)
	oldActive.className = "";

	oldActive = a;
	a.className = "active";

	//if (isIE)
	// a.hideFocus = "true";
	}
	}

	/**
	* Selects a topic in the tree: expand tree and highlight it
	*/
	function selectTopic(topic)
	{
	var links = document.getElementsByTagName("a");

	for (var i=0; i<links.length; i++)
	{
	if (topic == links[i].href)
	{
	expandPathTo(links[i]);
	highlightTopic(links[i]);
	scrollIntoView(links[i]);
	return true;
	}
	}
	return false;
	}

	/**
	* Scrolls the page to show the specified element
	*/
	function scrollIntoView(node)
	{
	var scroll = getVerticalScroll(node);
	if (scroll != 0)
	window.scrollBy(0, scroll);
	}

	/**
	* Scrolls the page to show the specified element
	*/
	function getVerticalScroll(node)
	{
	var nodeTop = node.offsetTop;
	var nodeBottom = nodeTop + node.offsetHeight;
	var pageTop = 0;
	var pageBottom = 0;

	if (isIE)
	{
	pageTop = document.body.scrollTop;
	pageBottom = pageTop + document.body.clientHeight;

	}
	else if (isMozilla)
	{
	pageTop = window.pageYOffset;
	pageBottom = pageTop + window.innerHeight - node.offsetHeight;
	}

	var scroll = 0;
	if (nodeTop >= pageTop )
	{
	if (nodeBottom <= pageBottom)
	scroll = 0; // already in view
	else
	scroll = nodeBottom - pageBottom;
	}
	else
	{
	scroll = nodeTop - pageTop;
	}

	return scroll;
	}

	/*
	* Currently called on IE only
	*/
	function focusHandler(e)
	{
	if (isMozilla)
	return;

	try{
	if (oldActive){
	// only focus when the element is visible
	var scroll = getVerticalScroll(oldActive);
	if (scroll == 0)
	oldActive.focus();
	}
	}
	catch(e){}
	}


	/**
	* display topic label in the status line on mouse over topic
	*/
	function mouseMoveHandler(e) {
	var overNode = getTarget(e);
	if (!overNode) return;

	overNode = getAnchorNode(overNode);
	if (overNode == null)
	return;

	if (isMozilla)
	e.cancelBubble = false;

	window.status = overNode.title;
	}

	/**
	* handler for expanding / collapsing topic tree
	*/
	function mouseClickHandler(e) {
	var clickedNode = getTarget(e);
	if (!clickedNode) return;

	if (isPlusMinus(clickedNode) )
	{
	if (isCollapsed(clickedNode))
	expand(clickedNode);
	else if (isExpanded(clickedNode))
	collapse(clickedNode);
	}
	else
	{
	var plus_minus = getPlusMinus(clickedNode);
	if (plus_minus != null)
	highlightTopic(plus_minus);
	}

	if (isMozilla)
	e.cancelBubble = true;
	else if (isIE)
	window.event.cancelBubble = true;
	}

	/**
	* handler for expanding / collapsing topic tree
	*/
	function mouseDblClickHandler(e) {

	var clickedNode = getTarget(e);
	if (!clickedNode) return;

	var plus_minus = getPlusMinus(clickedNode);
	if (plus_minus != null)
	{
	if (isCollapsed(plus_minus))
	expand(plus_minus);
	else if (isExpanded(plus_minus))
	collapse(plus_minus);

	highlightTopic(plus_minus);
	}

	if (isMozilla)
	e.cancelBubble = true;
	else if (isIE)
	window.event.cancelBubble = true;
	}

	/**
	* Handler for key down (arrows)
	*/
	function keyDownHandler(e)
	{
	var key;
	var altKey;
	var shiftKey;
	var ctrlKey;

	if (isIE) {
	key = window.event.keyCode;
	altKey = window.event.altKey;
	shiftKey = window.event.shiftKey;
	ctrlKey = window.event.ctrlKey;
	} else if (isMozilla) {
	key = e.keyCode;
	altKey = e.altKey;
	shiftKey = e.shiftKey;
	ctrlKey = e.ctrlKey;
	}

	if (key == 9 \|\| key == 13 \|\| altKey \|\| shiftKey \|\| ctrlKey ) // tab, enter or modifiers
	return true;

	if (isMozilla)
	e.cancelBubble = true;
	else if (isIE)
	window.event.cancelBubble = true;

	if (key == 39) { // Right arrow, expand
	var clickedNode = getTarget(e);
	if (!clickedNode) return;

	var plus_minus = getPlusMinus(clickedNode);
	if (plus_minus != null)
	{
	if (isCollapsed(plus_minus))
	expand(plus_minus);

	highlightTopic(plus_minus);
	scrollIntoView(clickedNode);
	}
	} else if (key == 37) { // Left arrow,collapse
	var clickedNode = getTarget(e);
	if (!clickedNode) return;

	var plus_minus = getPlusMinus(clickedNode);
	if (plus_minus != null)
	{
	if (isExpanded(plus_minus))
	collapse(plus_minus);

	highlightTopic(plus_minus);
	scrollIntoView(clickedNode);
	}
	} else if (key == 40 ) { // down arrow
	var clickedNode = getTarget(e);
	if (!clickedNode) return;

	var next = getNextDown(clickedNode);
	if (next)
	next.focus();

	} else if (key == 38 ) { // up arrow
	var clickedNode = getTarget(e);
	if (!clickedNode) return;

	var next = getNextUp(clickedNode);
	if (next)
	next.focus();
	}


	return false;
	}

	if (isMozilla) {
	document.addEventListener('click', mouseClickHandler, true);
	document.addEventListener('dblclick', mouseDblClickHandler, true);
	document.addEventListener('mousemove', mouseMoveHandler, true);
	document.addEventListener('keydown', keyDownHandler, true);
	}
	else if (isIE){
	document.onclick = mouseClickHandler;
	document.ondblclick = mouseDblClickHandler;
	document.onmousemove = mouseMoveHandler;
	document.onkeydown = keyDownHandler;
	window.onfocus = focusHandler;
	}