his is an expanding menu system based on an idea seen at DoubleYou.com.

Example here 

Instructions

• Set up the styles for dot, dotempty, dotoff and caption.


• Create the base menu object using:
  var menu = new menuObject(objName,xPos,yPos,caption,startRadius);
  Where objName in this example = "menu"
  xPos and yPos = start position of menu
  caption = text
  startRadius = base distance of subMenus


• Display and hide menu and caption using menu.show(), menu.showcaption() and menu.hide() and menu.hideCaption()


• Move menu using menu.moveMe(x,y) or menu.moveBy(dx,dy) (moveMe is relative to parent's position or (0,0) if no parent)


• add item's using sub = menu.addItem(caption, action) where action is a string that is evaluated when you click the dot (use "toggle" if you want it to open the submenu)

Source
You have two options on getting the source to this script.

1. Copy the source from the textboxes below and place the code inside the body textbox in the body of your document and the code in the head textbox in the head of your document. If there are images to the script right click on the images below the textboxes and choose "save as" to get them.

2. Download the sourcecode and images in a zip file

Head

<sup><style type="text/css">
.dot         { position: absolute; width: 6; height: 6; visibility: hidden; background-color: red; font-size: 1px; cursor: pointer; cursor: hand; z-index: 100 }
.dotoff      { position: absolute; width: 6; height: 6; visibility: hidden; background-color: gray; font-size: 1px; cursor:default; z-index: 100}
.dotempty    { position: absolute; width: 6; height: 6; visibility: hidden; background-color: orange; font-size: 1px; cursor: pointer; cursor: hand; zindex: 100 }
.caption     { position: absolute; visibility: hidden; font-family: Tahoma; color: black;
               font-size: 11px; text-align: Center; cursor: default; z-index:
               1 }

body           { margin: 0px; background-color: white; }
a               { color: silver; text-decoration: none }
p               { font-size: 10px; font-family: tahoma; color: black }
</style>


<script language="JavaScript" type="text/javascript">
/**********************************************************************************  
DotMenu
*   Copyright (C) 2001 Dan Pupius
*   This script was released at DHTMLCentral.com
*   Visit for more great scripts!
*   This may be used and changed freely as long as this msg is intact!
*   We will also appreciate any links you could give us.
*
*   Made by Dan Pupius
*
*   Script date: 09/13/2001 (keep this date to check versions)
*********************************************************************************/
function lib_bwcheck(){ //Browsercheck (needed)
    this.ver=navigator.appVersion
    this.agent=navigator.userAgent
    this.dom=document.getElementById?1:0
    this.opera5=(navigator.userAgent.indexOf("Opera")>-1 && document.getElementById)?1:0
    this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom && !this.opera5)?1:0;
    this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom && !this.opera5)?1:0;
    this.ie4=(document.all && !this.dom && !this.opera5)?1:0;
    this.ie=this.ie4||this.ie5||this.ie6
    this.mac=this.agent.indexOf("Mac")>-1
    this.ns6=(this.dom && parseInt(this.ver) >= 5) ?1:0;
    this.ns4=(document.layers && !this.dom)?1:0;
    this.bw=(this.ie6 || this.ie5 || this.ie4 || this.ns4 || this.ns6 || this.opera5)
    return this
}
var bw=lib_bwcheck()
// The code of this script is in the body, the browsercheck above is not used.

</script></sup>

Body

<sup><br>
<script language="javascript1.2" type="text/javascript">
<!--
// DotMenu
// provides cross-browser functionality
//======================================
function getObjectRef(name) {
  if(document.getElementById) return document.getElementById(name);
  else if(document.all) return document.all[name];
  else return null;
}

// general functions to assist the script
//========================================
function show(name) {
  var el = getObjectRef(name);
  if(el) el.style.visibility = "visible";
}
function hide(name) {
  var el = getObjectRef(name);
  if(el) el.style.visibility = "hidden";
}
function getWidth(name) {
  var el = getObjectRef(name);
  return el.offsetWidth;
}
function getHeight(name) {
  var el = getObjectRef(name);
  return el.offsetHeight;
}
function moveMe(name,x,y) {
  var el = getObjectRef(name);
  if(el) { el.style.top = parseInt(y); el.style.left = parseInt(x); } 
}
function moveBy(name,x,y) {
  var el = getObjectRef(name);
  if(el) { el.style.top = parseInt(el.style.top) + parseInt(y); el.style.left = parseInt(el.style.left) + parseInt(x); } 
}

// Creates the menu objects
//==========================
var menuCount = 0;
function menuObject(name,x,y,caption, r, parent) {
  if ( (!document.getElementById&&!document.all) || navigator.userAgent.indexOf("Opera")>-1) return;
  document.write('<div id="divDot' + menuCount + '" class="dotempty" style="top: ' + y + '; left: ' + x + '"></div>');
  document.write('<div id="divCap' + menuCount + '" class="caption" style="top: 0; left: 0">' + caption + '</div>');
 
  this.name = name;
  this.parent = parent
  this.ref = "divDot" + menuCount;
  this.caption = "divCap" + menuCount
  if(r) this.radius = r;
  else this.radius = 400;
  this.subMenus = new Array();
  this.state = 0;
  this.moving = false;
  if(this.parent) this.action = "null";
  else this.action = "toggle";
  if(this.parent) this.startAngle = parent.startAngle;
  else this.startAngle = 0;

  getObjectRef(this.ref).objRef = this.name;
 
  this.show = function() { show(this.ref); }
  this.hide = function() { hide(this.ref); }
  this.moveMe = function(x,y) { if(this.parent) { x += this.parent.x(); y += this.parent.y(); } moveMe(this.ref,x,y); }
  this.moveBy = function(x,y) { moveBy(this.ref,x,y); }
  this.x = function() { return parseInt(getObjectRef(this.ref).style.left); }
  this.y = function() { return parseInt(getObjectRef(this.ref).style.top); }
  this.w = function() { return getWidth(this.ref); }
  this.h = function() { return getHeight(this.ref); }

  this.showCaption = function() {
    moveMe(this.caption, this.x() - (getWidth(this.caption)/2) + (this.w()/2), (this.y() + this.h()));
    show(this.caption);
  }
  this.hideCaption = function() {
    hide(this.caption);
  }
  this.setCaption = function(c) { getObjectRef(this.caption).innerHTML = c;}
 
  this.addItem = function(c,action,r) {
    getObjectRef(this.ref).className = "dot";
    if(!r) r = this.radius/2;
    var sub = new menuObject(this.name + ".subMenus[" + this.subMenus.length + "]",0,0,c,r,this);
    sub.parent = this;
    sub.action = action;
    sub.moveMe(0,0);
    this.subMenus[this.subMenus.length] = sub;
    return sub;
  }
 
  this.expand = function() {
    if(this.subMenus.length > 0) {
      var p = true;
      if(this.parent) {
        p = !this.parent.moving;
        for(var i=0; i<this.parent.subMenus.length;i++)
          p = p && ((this.parent.subMenus[i].state==0) || (this.parent.subMenus[i].state==this.parent.subMenus[i].subMenus.length)) && (this.parent.subMenus[i].moving==false);
      } else var o = false;
     

      if((!this.parent || this.parent.state == this.parent.subMenus.length) && p) {
        if(this.parent) this.collapseAll(this.name);
       
        var diff = 360 / this.subMenus.length;
        for(var i=0;i<this.subMenus.length;i++){
          this.subMenus[i].moveMe(0,0);
          this.subMenus[i].show();
          this.moving = true;
          this.subMenus[i].slide(this.subMenus[i].radius * cos(degToRad((diff*i)+this.startAngle)), this.subMenus[i].radius * sin(degToRad((diff*i)+this.startAngle)), this.name + ".subMenus[" + i + "].showCaption();" + this.name + ".moving=false;" + this.name + ".state+=1;");
        }
        if(this.parent){
          getObjectRef(this.parent.ref).style.filter = "alpha (opacity=33)";
          getObjectRef(this.parent.ref).style.MozOpacity = "33%";

          getObjectRef(this.parent.ref).className = "dotoff";
          getObjectRef(this.parent.caption).style.filter = "alpha (opacity=33)";
          getObjectRef(this.parent.caption).style.MozOpacity = "33%";
          for(i=0;i<this.parent.subMenus.length;i++) {
              getObjectRef(this.parent.subMenus[i].ref).style.filter = "alpha (opacity=66)";
              getObjectRef(this.parent.subMenus[i].ref).style.MozOpacity = "66%";
              getObjectRef(this.parent.subMenus[i].caption).style.filter = "alpha (opacity=66)";
              getObjectRef(this.parent.subMenus[i].caption).style.MozOpacity = "66%";       
          }
          if(this.parent.parent) {
            for(i=0;i<this.parent.parent.subMenus.length;i++) {
              getObjectRef(this.parent.parent.subMenus[i].ref).style.filter = "alpha (opacity=33)";
              getObjectRef(this.parent.parent.subMenus[i].ref).style.MozOpacity = "33%";
              getObjectRef(this.parent.parent.subMenus[i].ref).className = "dotoff";
              getObjectRef(this.parent.parent.subMenus[i].caption).style.filter = "alpha (opacity=33)";       
              getObjectRef(this.parent.parent.subMenus[i].caption).style.MozOpacity = "33%";
            }
            getObjectRef(this.parent.parent.ref).style.MozOpacity = "33%";
            getObjectRef(this.parent.parent.ref).style.MozOpacity = "33%";
            getObjectRef(this.parent.parent.ref).className = "dotoff";
          }
        }
        getObjectRef(this.ref).style.filter = "alpha (opacity=66)";
        getObjectRef(this.caption).style.filter = "alpha (opacity=66)"; 
        getObjectRef(this.ref).style.MozOpacity = "66%";
        getObjectRef(this.caption).style.MozOpacity = "66%";
      }
    } 
  }

  this.collapse = function() {
    var p = true;
    p = !this.moving;
    for(var i=0; i<this.subMenus.length;i++)
      p = p && (this.subMenus[i].state==0)  && (this.subMenus[i].moving==false);
   
    if(p && this.subMenus.length > 0) {
      for(var i=0;i<this.subMenus.length;i++){
        this.subMenus[i].hideCaption();
        this.moving = true;
        this.subMenus[i].slide(0, 0, this.name + ".subMenus[" + i + "].hide();" + this.name + ".moving=false;" + this.name + ".state-=1;");
      }
      if(this.parent){
        getObjectRef(this.parent.ref).style.filter = "alpha (opacity=66)";
        getObjectRef(this.parent.ref).style.MozOpacity = "66%";
        if(this.parent.subMenus.length != 0)
          getObjectRef(this.parent.ref).className = "dot";
        else
          getObjectRef(this.parent.ref).className = "dotempty";
        getObjectRef(this.parent.caption).style.filter = "alpha (opacity=66)";
        getObjectRef(this.parent.caption).style.MozOpacity = "66%";
        for(i=0;i<this.parent.subMenus.length;i++) {
          getObjectRef(this.parent.subMenus[i].ref).style.filter = "alpha (opacity=100)";
          getObjectRef(this.parent.subMenus[i].ref).style.MozOpacity = "100%";
          if(this.parent.subMenus[i].subMenus.length != 0)
            getObjectRef(this.parent.subMenus[i].ref).className = "dot";
          else
            getObjectRef(this.parent.subMenus[i].ref).className = "dotempty";
          getObjectRef(this.parent.subMenus[i].caption).style.filter = "alpha (opacity=100)";       
          getObjectRef(this.parent.subMenus[i].caption).style.MozOpacity = "100%";
        }
        if(this.parent.parent) {
          for(i=0;i<this.parent.parent.subMenus.length;i++) {
            getObjectRef(this.parent.parent.subMenus[i].ref).style.filter = "alpha (opacity=66)";
            getObjectRef(this.parent.parent.subMenus[i].ref).style.MozOpacity = "66%";
            if(this.parent.parent.subMenus[i].subMenus.length != 0)
              getObjectRef(this.parent.parent.subMenus[i].ref).className = "dot";
            else
              getObjectRef(this.parent.parent.subMenus[i].ref).className = "dotempty";
            getObjectRef(this.parent.parent.subMenus[i].caption).style.filter = "alpha (opacity=66)";       
            getObjectRef(this.parent.parent.subMenus[i].caption).style.MozOpacity = "66%";
          }
        }
      }
      getObjectRef(this.ref).style.filter = "alpha (opacity=100)";
      getObjectRef(this.caption).style.filter = "alpha (opacity=100)";      
      getObjectRef(this.ref).style.MozOpacity = "100%";
      getObjectRef(this.caption).style.MozOpacity = "100%";
    }
  }

  this.collapseAll = function(except) {
    for(var i=0;i<this.parent.subMenus.length;i++) {
      if(this.parent.subMenus[i].name!=except && this.parent.subMenus[i].state==this.parent.subMenus[i].subMenus.length) {
        this.parent.subMenus[i].collapse();
      }   
    }
  }
 
  this.toggle = function(e) {
    if(document.all) id = window.event.srcElement;
    else id = e.target;
    var dot = eval(id.objRef);
   
    if(dot.state==0 && !dot.moving) dot.expand();
    else if(dot.state==dot.subMenus.length && !dot.moving) dot.collapse()
  }
 
  this.doAction = function(e) {
    if(document.all) id = window.event.srcElement;
    else id = e.target;
    var dot = eval(id.objRef);
   
    if(dot.action == "toggle") dot.toggle(e);
    else eval(dot.action);
  }
 
  //change these if you want to change the events that trigger the actions
  //========================================================================
  //getObjectRef(this.ref).onmousemove = this.toggle;
  getObjectRef(this.ref).onmouseup = this.doAction;
 
  this.slide = function(xx,yy,func) {
    if(!func) func = "";
    var px = this.parent.x();
    var py = this.parent.y();
   
    var x = xx - this.x() + px;
    var y = yy - this.y() + py;
   
    var d = sqrt(square(xx-this.x() + px) + square(yy-this.y() + py));
   
    var v = d/8;
    if(v<1) v = 1;
       
    if( (Math.abs(x) < v) && (Math.abs(y) < v) ) {
      moveMe(this.ref,xx + px,yy + py);     
      if(func != "") eval(func);
    } else {   
      var a = round(atan(x,y));
      dx = round(v * cos(degToRad(a)));
      dy = round(v * sin(degToRad(a)));
  
      this.moveBy(dx,dy);
      setTimeout(this.name + ".slide(" + xx + "," + yy + ", '" + func + "');",10);   
    }
  }
  // Preoading the windows filters.
  if (menuCount==0 && document.all) document.all[this.ref].style.filter = "alpha (opacity=100)";
  menuCount++;
  return this;
}


// Math functions
//================
var pi = Math.PI;
function square(x) { return (x*x); }
function sqrt(x) { return Math.sqrt(x); }
function round(x) { return Math.round(x); }
function rand(x,y) { return (round(Math.random()*(y-x)) + x); }

function cos(x) { return Math.cos(x) }
function sin(x) { return Math.sin(x) }
   
function degToRad(x) { return ( x/(360/(2*pi)) ); }
function radToDeg(x) { return ( x*(360/(2*pi)) ); }


function atan(s,t) {
  if( s == 0.0 && t > 0.0)
    angle = 90.0;
  else if(s == 0.0 && t < 0.0)
    angle = 270.0;
  else if (s < 0.0 )
    angle = 180.0 + radToDeg(Math.atan(t/s));
  else if (s > 0.0 && t < 0.0)
    angle = 360.0 + radToDeg(Math.atan(t/s));
  else {
    if(s==0.0) s=0.00001;
    angle = radToDeg(Math.atan(t/s));
  }
  if(angle < 0.0) angle += 360.0;
  return angle;
}



//====================================================================================
// make the menus and provide information on usage
//====================================================================================
//
// In order to customise your menus all you need to do is:
//   - edit the styles .dot, .dotoff and .caption
//   - add the main menu using the following code
//         var [menu_name] = new menuObject("[menu_name]", [x position], [y position], [caption], [spacing between sub menus]);
//   - add the subemus using:
//         var [sub_menu] = [menu_name].addItem([caption],[action],[spacing]);
//       OR
//         var [sub-sub_menu] = [sub_menu].addItem([caption],[action],[spacing]);
//       OR
//         [menu_name].subMenus[x].addItem([caption],[action],[spacing]);
//
//       - where action is string that get's evaluated when the dot is clicked
//
//       (NOTE the spacing is optional and if left blank gets inherited
//             and is equal to the  (parent's value)/2 - the default for
//             the main menu item uis 400)
//
//   - the following allow extra manipulation of the menus:
//          + menuItem.show()              - show's the menu's dot
//          + menuItem.showCaption()       - show's the menu's caption
//          + menuItem.hide()
//          + menuItem.hideCaption()
//          + menuItem.startAngle = x      - default is 0-degrees which means the first submenu appears
//                                           directly to the right, the following items are traced in a
//                                           clockwise direction
//          + menuItem.setCaption("text")  - allows you to change a menus caption
//          + menuItem.expand()            - opens a menus submenus (if they exist)
//          + menuItem.collapse()          - closes a menu's subItems (unless one of them is open)
//
//          + menuItem.moveMe(x,y)         - moves a menu to coordinates (x,y)
//          + menuItem.moveBy(x,y)         - moves a menu by (x,y)-pixels
//          + menuItem.x() & menuItem.y()  - retrieve a menus coordinates
//
//====================================================================================

//get dimentions of the page
if(document.all) pageWidth = document.body.offsetWidth-20;
else pageWidth = innerWidth;
if(document.all) pageHeight = document.body.offsetHeight-4;
else pageHeight = innerHeight;

//Create main menu
var menu = new menuObject("menu",pageWidth/2,pageHeight/2,"DhtmlCentral Site Map",pageHeight/2);
menu.startAngle = -90;

//show menu and caption
menu.show();
menu.showCaption();

//Add submenus
menu.addItem("news","window.open('/news')");
menu.addItem("scripts","toggle");
menu.addItem("tutorials","toggle");
menu.addItem("forums","toggle");
menu.addItem("resources","toggle");

menu.subMenus[1].addItem("FoldOutMenu","window.open('/script/script22.asp')");
menu.subMenus[1].addItem("Loading Bar","window.open('/script/script17.asp')");
menu.subMenus[1].addItem("Window Script","window.open('/script/script16.asp')");
menu.subMenus[1].addItem("PageSlideFade","window.open('/script/script15.asp')");
menu.subMenus[1].addItem("Circle Menu","window.open('/script/script14.asp')");
menu.subMenus[1].addItem("Annimation Intro","window.open('/script/script9.asp')");
menu.subMenus[1].addItem("NewsSlideFade","window.open('/script/script10.asp')");
menu.subMenus[1].addItem("Other Scripts","window.open('/script/')");


menu.subMenus[2].addItem("Scripting for vs5 browsers","window.open('/tutorials/tutorial5.asp')");
menu.subMenus[2].addItem("Makeing a Dhtml Script","window.open('/tutorials/tutorial6.asp')");
menu.subMenus[2].addItem("Filters & Transitions","window.open('/tutorials/tutorial4.asp')");
menu.subMenus[2].addItem("Dhtml Library","window.open('/tutorials/tutorial3.asp')");
menu.subMenus[2].addItem("Document Size","window.open('/tutorials/tutorial2.asp')");
menu.subMenus[2].addItem("Dhtml Intro","window.open('/tutorials/tutorial1.asp')");

menu.subMenus[3].addItem("Forum listings","window.open('/forums')");
menu.subMenus[3].addItem("Cool Sites","window.open('/forums/forum.asp?FORUM_ID=1&CAT_ID=1&Forum_Title=Cool+sites')");
menu.subMenus[3].addItem("CoolMenus","window.open('/forums/forum.asp?FORUM_ID=2&CAT_ID=1&Forum_Title=CoolMenus')");
menu.subMenus[3].addItem("Cross Browser","window.open('/forums/forum.asp?FORUM_ID=3&CAT_ID=1&Forum_Title=Crossbrowser+DHTML')");
menu.subMenus[3].addItem("Scripts","window.open('/forums/forum.asp?FORUM_ID=4&CAT_ID=1&Forum_Title=DHTML+Scripts')");
menu.subMenus[3].addItem("General","window.open('/forums/forum.asp?FORUM_ID=6&CAT_ID=1&Forum_Title=General+DHTML+issues')");
menu.subMenus[3].addItem("Off-Topic","window.open('/forums/forum.asp?FORUM_ID=9&CAT_ID=1&Forum_Title=Off%2Dtopic')");


c = menu.subMenus[4].addItem("Cool Sites","toggle");
c.startAngle = 15;
menu.subMenus[4].addItem("Portals","window.open('/resources/default.asp?catid=7&cattitle=Portals')");
menu.subMenus[4].addItem("Script Sites","window.open('/resources/default.asp?catid=1&cattitle=Script+sites')");
menu.subMenus[4].addItem("Tutorials &<br>References","toggle");

menu.subMenus[4].subMenus[0].addItem("Comercial Sites","window.open('/resources/default.asp?catid=5&cattitle=Commercial+sites')");
menu.subMenus[4].subMenus[0].addItem("Personal Sites","window.open('/resources/default.asp?catid=6&cattitle=Personal+sites')");
menu.subMenus[4].subMenus[0].addItem("Experimental Projects","window.open('/resources/default.asp?catid=4&cattitle=Experimental+projects')");

menu.subMenus[4].subMenus[3].addItem("References","window.open('/resources/default.asp?catid=8&cattitle=References')");
menu.subMenus[4].subMenus[3].addItem("Tutorials & Articles","window.open('/resources/default.asp?catid=9&cattitle=Tutorials+and+Articles')");


//--></script>

<p>   <b>INSTRUCTIONS</b><br>
   - click the dots to expand/collapse the tiers or perform the action<br>
   - a menu's sub-menus must be collapsed in order to collapse it's parent</p></sup>