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 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
  "http://www.w3.org/tr/xhtml1/DTD/xhtml1-transitional.dtd">
<!-- 
     Example File From "JavaScript and DHTML Cookbook"
     Published by O'Reilly & Associates
     Copyright 2003 Danny Goodman
-->
<html>
<head>
<title>Recipe 10.10.TOC</title>
<style type="text/css">
    .OLRow {vertical-align:middle; font-size:12px; line-height:11px; font-family:Arial,sans-serif}
    .OLBlock {display:none}
    img.widgetArt {vertical-align:text-top}
</style>
<script type="text/javascript">
/**********************************
          GLOBAL VARIABLES
***********************************/
// pre-cache art files and sizes for widget styles and spacers
// (all images must have same height/width)
var collapsedWidget = new Image(2016);
collapsedWidget.src = "oplus.gif";
var collapsedWidgetStart = new Image(2016);
collapsedWidgetStart.src = "oplusStart.gif";
var collapsedWidgetEnd = new Image(2016);
collapsedWidgetEnd.src = "oplusEnd.gif";
var expandedWidget = new Image(2016);
expandedWidget.src = "ominus.gif";
var expandedWidgetStart = new Image(2016);
expandedWidgetStart.src = "ominusStart.gif";
var expandedWidgetEnd = new Image(2016);
expandedWidgetEnd.src = "ominusEnd.gif";
var nodeWidget = new Image(2016);
nodeWidget.src = "onode.gif";
var nodeWidgetEnd = new Image(2016);
nodeWidgetEnd.src = "onodeEnd.gif";
var emptySpace = new Image(2016);
emptySpace.src = "oempty.gif";
var chainSpace = new Image(2016);
chainSpace.src = "ochain.gif";

// miscellaneous globals
var widgetWidth = "20";
var widgetHeight = "16";
var currState = "";
var displayTarget = "contentFrame";

/**********************************
           DATA COLLECTIONS
***********************************/
var expansionState = "";
// constructor for outline item objects
function outlineItem(text, uri) {
    this.text = text;
    this.uri = uri;
}
var olData = {childNodes:
             [{item:new outlineItem("Forms"),
               childNodes:
                   [{item:new outlineItem("Introduction""http://www.w3.org/TR/html401/interact/forms.html#h-17.1")},
                    {item:new outlineItem("Controls""http://www.w3.org/TR/html401/interact/forms.html#h-17.2"),
                     childNodes:
                         [{item:new outlineItem("Control Types""http://www.w3.org/TR/html401/interact/forms.html#h-17.2.1")}
                          ]},
                    {item:new outlineItem("FORM Element""http://www.w3.org/TR/html401/interact/forms.html#h-17.3")},
                    {item:new outlineItem("INPUT Element""http://www.w3.org/TR/html401/interact/forms.html#h-17.4"),
                     childNodes:
                         [{item:new outlineItem("INPUT Control Types""http://www.w3.org/TR/html401/interact/forms.html#h-17.4.1")},
                          {item:new outlineItem("Examples""http://www.w3.org/TR/html401/interact/forms.html#h-17.4.2")}
                          ]},
                    {item:new outlineItem("BUTTON Element""http://www.w3.org/TR/html401/interact/forms.html#h-17.5")},
                    {item:new outlineItem("SELECT, OPTGROUP, OPTION Elements""http://www.w3.org/TR/html401/interact/forms.html#h-17.6"),
                     childNodes:
                         [{item:new outlineItem("Pre-selected Options""http://www.w3.org/TR/html401/interact/forms.html#h-17.6.1")}
                          ]},
                    {item:new outlineItem("TEXTAREA Element""http://www.w3.org/TR/html401/interact/forms.html#h-17.7")},
                    {item:new outlineItem("ISINDEX Element""http://www.w3.org/TR/html401/interact/forms.html#h-17.8")},
                    {item:new outlineItem("Labels""http://www.w3.org/TR/html401/interact/forms.html#h-17.9"),
                     childNodes:
                         [{item:new outlineItem("LABEL Element""http://www.w3.org/TR/html401/interact/forms.html#h-17.9.1")}
                          ]},
                    {item:new outlineItem("FIELDSET, LEGEND Elements""http://www.w3.org/TR/html401/interact/forms.html#h-17.10")},
                    {item:new outlineItem("Element Focus""http://www.w3.org/TR/html401/interact/forms.html#h-17.11"),
                     childNodes:
                         [{item:new outlineItem("Tabbing Navigation""http://www.w3.org/TR/html401/interact/forms.html#h-17.11.1")},
                          {item:new outlineItem("Access Keys""http://www.w3.org/TR/html401/interact/forms.html#h-17.11.2")}
                          ]},
                    {item:new outlineItem("Disabled and Read-Only Controls""http://www.w3.org/TR/html401/interact/forms.html#h-17.12"),
                     childNodes:
                         [{item:new outlineItem("Disabled Controls""http://www.w3.org/TR/html401/interact/forms.html#h-17.12.1")},
                          {item:new outlineItem("Read-Only Controls""http://www.w3.org/TR/html401/interact/forms.html#h-17.12.2")}
                          ]},
                    {item:new outlineItem("Form Submissions""http://www.w3.org/TR/html401/interact/forms.html#h-17.13"),
                     childNodes:
                         [{item:new outlineItem("Form Submission Method""http://www.w3.org/TR/html401/interact/forms.html#h-17.13.1")},
                          {item:new outlineItem("Successful Controls""http://www.w3.org/TR/html401/interact/forms.html#h-17.13.2")},
                          {item:new outlineItem("Processing Form Data""http://www.w3.org/TR/html401/interact/forms.html#h-17.13.3"),
                           childNodes:
                               [{item:new outlineItem("1. Identify Successful Controls""http://www.w3.org/TR/html401/interact/forms.html#h-17.13.3.1")},
                                {item:new outlineItem("2. Build Form Data Set""http://www.w3.org/TR/html401/interact/forms.html#h-17.13.3.2")},
                                {item:new outlineItem("3. Encode Form Data""http://www.w3.org/TR/html401/interact/forms.html#h-17.13.3.3")},
                                {item:new outlineItem("4. Submit Encoded Data""http://www.w3.org/TR/html401/interact/forms.html#h-17.13.3.4")}
                                ]},
                          {item:new outlineItem("Form Content Types""http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4"),
                           childNodes:
                               [{item:new outlineItem("application/x-www-form-urlencoded""http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4.1")},
                                {item:new outlineItem("multipart/form-data""http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4.2")}
                                ]
                           }
                          ]
                       }
                    ]},
              {item:new outlineItem("Scripts"),
               childNodes:
                   [{item:new outlineItem("Introduction""http://www.w3.org/TR/html401/interact/scripts.html#h-18.1")},
                    {item:new outlineItem("Designing Documents for Scripts""http://www.w3.org/TR/html401/interact/scripts.html#h-18.2"),
                     childNodes:
                         [{item:new outlineItem("SCRIPT Element""http://www.w3.org/TR/html401/interact/scripts.html#h-18.2.1")},
                           {item:new outlineItem("Specifying the Scripting Language""http://www.w3.org/TR/html401/interact/scripts.html#h-18.2.2"),
                           childNodes:
                               [{item:new outlineItem("Default Language""http://www.w3.org/TR/html401/interact/scripts.html#h-18.2.2.1")},
                                {item:new outlineItem("Local Language Declaration""http://www.w3.org/TR/html401/interact/scripts.html#h-18.2.2.2")},
                                {item:new outlineItem("References to HTML Elements""http://www.w3.org/TR/html401/interact/scripts.html#h-18.2.2.3")}
                                ]},
                           {item:new outlineItem("Intrinsic Events""http://www.w3.org/TR/html401/interact/scripts.html#h-18.2.3")},
                           {item:new outlineItem("Dynamic Document Modification""http://www.w3.org/TR/html401/interact/scripts.html#h-18.2.4")}
                          ]},
                    {item:new outlineItem("Designing for Unscriptable Clients""http://www.w3.org/TR/html401/interact/scripts.html#h-18.3"),
                     childNodes:
                         [{item:new outlineItem("NOSCRIPT Element""http://www.w3.org/TR/html401/interact/scripts.html#h-18.3.1")},
                          {item:new outlineItem("Hiding Scripts from Clients""http://www.w3.org/TR/html401/interact/scripts.html#h-18.3.2")}
                          ]}
                   ]}
                  ]
              };
          
          


/**********************************
  TOGGLE DISPLAY AND ICONS
***********************************/
// invert item state (expanded to/from collapsed)
function swapState(currState, currVal, n) {
    var newState = currState.substring(0,n);
    newState += currVal ^ // Bitwise XOR item n;
    newState += currState.substring(n+1,currState.length);
    return newState;
}

// retrieve matching version of 'minus' images
function getExpandedWidgetState(imgURL) {
    if (imgURL.indexOf("Start"!= -1) {
        return expandedWidgetStart.src;
    }
    if (imgURL.indexOf("End"!= -1) {
        return expandedWidgetEnd.src;
    }
    return expandedWidget.src;
}

// retrieve matching version of 'plus' images
function getCollapsedWidgetState(imgURL) {
    if (imgURL.indexOf("Start"!= -1) {
        return collapsedWidgetStart.src;
    }
    if (imgURL.indexOf("End"!= -1) {
        return collapsedWidgetEnd.src;
    }
    return collapsedWidget.src;
}

// toggle an outline mother entry, storing new state value;
// invoked by onclick event handlers of widget image elements
function toggle(img, blockNum) {
    var newString = "";
    var expanded, n;
    // modify state string based on parameters from IMG
    expanded = currState.charAt(blockNum);
    currState = swapState(currState, expanded, blockNum);
    // dynamically change display style
    if (expanded == "0") {
        document.getElementById("OLBlock" + blockNum).style.display = "block";
        img.src = getExpandedWidgetState(img.src);
    else {
        document.getElementById("OLBlock" + blockNum).style.display = "none";
        img.src = getCollapsedWidgetState(img.src);
    }
}

function expandAll() {
    var newState = "";
    while (newState.length < currState.length) {
        newState += "1";
    }
    currState = newState;
    initExpand();
}

function collapseAll() {
    var newState = "";
    while (newState.length < currState.length) {
        newState += "0";
    }
    currState = newState;
    initExpand();
}

/*********************************
   OUTLINE HTML GENERATION
**********************************/
// apply default expansion state from outline's header
// info to the expanded state for one element to help 
// initialize currState variable
function calcBlockState(n) {
    // get default expansionState data
    var expandedData = (expansionState.length > 0? expansionState.split(","null;
    if (expandedData) {
        for (var j = 0; j < expandedData.length; j++) {
            if (n == expandedData[j1) {
                return "1";
            }
        }
    }
    return "0";
}

// counters for reflexive calls to drawOutline()
var currID = 0;
var blockID = 0;
// generate HTML for outline
function drawOutline(ol, prefix) {
    var output = "";
    var nestCount, link, nestPrefix, lastInnerNode;
    prefix = (prefix? prefix : "";
    for (var i = 0; i < ol.childNodes.length ; i++) {
        nestCount = (ol.childNodes[i].childNodes? ol.childNodes[i].childNodes.length : 0;
        output += "<div class='OLRow' id='line" + currID++ + "'>n";
        if (nestCount > 0) {
            output += prefix;
            output += "<img id='widget" (currID-1"' src='" ((i == ol.childNodes.length-&& blockID != 0? collapsedWidgetEnd.src : (blockID == 0? collapsedWidgetStart.src : collapsedWidget.src);
            output += "' height=" + widgetHeight + " width=" + widgetWidth;
            output += " title='Click to expand/collapse nested items.' onClick='toggle(this," + blockID + ")'>&nbsp;";
            link =  (ol.childNodes[i].item.uri? ol.childNodes[i].item.uri : "";
            if (link) {
                output += "<a href='" + link + "' class='itemTitle' title='" 
                link + "' target='" + displayTarget + "'>" ;
            else {
                output += "<a class='itemTitle' title='" + link + "'>";
            }
            output += "<span style='position:relative; top:-3px; height:11px'>" + ol.childNodes[i].item.text + "</span></a>";
            currState += calcBlockState(currID-1);
            output += "<span class='OLBlock' blocknum='" + blockID + "' id='OLBlock" + blockID++ + "'>";
            nestPrefix = prefix;
            nestPrefix += (i == ol.childNodes.length - 1
                       "<img src='" + emptySpace.src + "' height=" + widgetHeight + " width=" + widgetWidth + ">" :
                       "<img src='" + chainSpace.src + "' height=" + widgetHeight + " width=" + widgetWidth + ">"
            output += drawOutline(ol.childNodes[i], nestPrefix);
            output += "</span></div>n";
        else {
            output += prefix;
            output += "<img id='widget" (currID-1"' src='" ((i == ol.childNodes.length - 1? nodeWidgetEnd.src : nodeWidget.src);
            output += "' height=" + widgetHeight + " width=" + widgetWidth + ">";
            link =  (ol.childNodes[i].item.uri? ol.childNodes[i].item.uri : "";
            if (link) {
                output += "&nbsp;<a href='" + link + "' class='itemTitle' title='" 
                link + "' target='" + displayTarget + "'>";
            else {
                output += "&nbsp;<a class='itemTitle' title='" + link + "'>";
            }
            output += "<span style='position:relative; top:-3px; height:11px'>" + ol.childNodes[i].item.text + "</span></a>";
            output += "</div>n";
        }
    }
    return output;
}

/*********************************
     OUTLINE INITIALIZATIONS
**********************************/
// expand items set in expansionState var, if any
function initExpand() {
    for (var i = 0; i < currState.length; i++) {
        if (currState.charAt(i== 1) {
            document.getElementById("OLBlock" + i).style.display = "block";
        else {
            document.getElementById("OLBlock" + i).style.display = "none";
        }
    }
}

// initialize first time -- invoked onload
function initExpMenu(xFile) {
    // wrap whole outline HTML in a span
    var olHTML = "<span id='renderedOL'>" + drawOutline(olData"</span>";
    // throw HTML into 'content' div for display
    document.getElementById("content").innerHTML = olHTML;
    initExpand();
}

</script>
</head>
<body style="font-family:Arial, sans-serif" onload="initExpMenu()">
<h1 style="font-size:1.2em; font-weight:bold">Expandable Navigation Menu</h1>
<hr />

<div id="content"></div>
</body>
</html>


           
       

Download : Download nav_TreeMenu.zip nav_TreeMenu.zip


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