If you ever seen many web pages, posts of professional knowledges, specialized in skills or researches; perhaps you would see many specialized in words that they're explained after each post/page.

... detail at JavaScriptBank.com - 2.000+ free JavaScript codes


How to setup

Step 1: Use CSS code below for styling the script
CSS
Code:
<style type="text/css">
/*
     This script downloaded from www.JavaScriptBank.com
     Come to view and download over 2000+ free javascript at www.JavaScriptBank.com
*/

dl.glossary:after {
  content: "."; 
  display: block; 
  height: 0; 
  clear: both; 
  visibility: hidden;
}
dl.glossary dt {
  float: left;
  clear: left;
  margin: 0;
  padding: 0 0 5px;
}
dl.glossary dt:after {
  content: ":";
}
dl.glossary dd {
  float: left;
  clear: right;
  margin: 0 0 0 5px;
  padding: 0 0 5px;
}
* html dl.glossary dd {
  clear: none;
  width: 80%;
}
</style>
Step 2: Copy & Paste JavaScript code below in your HEAD section
JavaScript
Code:
<script type="text/javascript">
// Created by: Aaron Gustafson | http://www.easy-designs.net/
// This script downloaded from www.JavaScriptBank.com

// ---------------------------------------------------------------------
//                             onLoad Handler
// ---------------------------------------------------------------------
var old = window.onload; // catch any existing onload calls 1st
window.onload = function () {
  if (old) { // execute existing onloads
    old();
  };
  for (var ii = 0; arguments.callee.actions.length > ii; ii++) {
    arguments.callee.actions[ii]();
  };
};
window.onload.actions = [];


/*------------------------------------------------------------------------------
Object:         pageGlossary (formerly makeGlossary)
Author:         Aaron Gustafson (aaron at easy-designs dot net)
Creation Date:  27 November 2005
Version:        1.0
Homepage:       http://www.easy-designs.net/code/pageGlossary/
License:        Creative Commons Attribution-ShareAlike 2.0 License
                http://creativecommons.org/licenses/by-sa/2.0/
Note:           If you change or improve on this script, please let us know by 
                emailing the author (above) with a link to your demo page.
------------------------------------------------------------------------------*/
var pageGlossary = {
  getFrom:  false,
  buildIn:  false,
  glossArr: [],
  usedArr:  [],
  init:     function( fromId, toId ){
    if( !document.getElementById || 
        !document.getElementsByTagName || 
        !document.getElementById( fromId ) || 
        !document.getElementById( toId ) ) return;
    pageGlossary.getFrom = document.getElementById( fromId );
    pageGlossary.buildIn = document.getElementById( toId );
    pageGlossary.collect();
    if( pageGlossary.usedArr.length < 1 ) return;
    pageGlossary.glossArr = pageGlossary.ksort( pageGlossary.glossArr );
    pageGlossary.build();
  },
  collect:  function(){
    var dfns  = pageGlossary.getFrom.getElementsByTagName('dfn');
    var abbrs = pageGlossary.getFrom.getElementsByTagName('abbr');
    var acros = pageGlossary.getFrom.getElementsByTagName('acronym');
    var arr = [];
    arr = arr.concat( dfns, abbrs, acros );
    if( ( arr[0].length == 0 ) &&
        ( arr[1].length == 0 ) && 
        ( arr[2].length == 0 ) ) return;
    var arrLength = arr.length;
    for( var i=0; i < arrLength; i++ ){
      var nestedLength = arr[i].length;
      if( nestedLength < 1 ) continue;
      for( var j=0; j < nestedLength; j++ ){
        if( !arr[i][j].hasChildNodes() ) continue;
        var trm = arr[i][j].firstChild.nodeValue;
        var dfn = arr[i][j].getAttribute( 'title' );
        if( !pageGlossary.inArray( trm, pageGlossary.usedArr ) ){
          pageGlossary.usedArr.push( trm );
          pageGlossary.glossArr[trm] = dfn;
        }
      }
    }
  },
  build:    function(){
    var h2 = document.createElement('h2');
    h2.appendChild( document.createTextNode( 'Page Glossary' ) );
    var dl = document.createElement('dl');
    dl.className = 'glossary';
    for( key in pageGlossary.glossArr ){
      var dt = document.createElement( 'dt' );
      dt.appendChild( document.createTextNode( key ) );
      dl.appendChild( dt );
      var dd = document.createElement('dd');
      dd.appendChild( document.createTextNode( pageGlossary.glossArr[key] ) );
      dl.appendChild( dd );
    }
    pageGlossary.buildIn.appendChild( h2 );
    pageGlossary.buildIn.appendChild( dl );
  },
  addEvent: function( obj, type, fn ){  // the add event function
    if (obj.addEventListener) obj.addEventListener( type, fn, false );
    else if (obj.attachEvent) {
      obj['e'+type+fn] = fn;
      obj[type+fn] = function() {
        obj['e'+type+fn]( window.event );
      };
      obj.attachEvent( 'on'+type, obj[type+fn] );
    }
  },
  ksort:    function( arr ){
    var rArr = [], tArr = [], n=0, i=0, el;
    for( el in arr ) tArr[n++] = el + '|' + arr[el];
    tArr = tArr.sort();
    var arrLength = tArr.length;
    for( var i=0; i < arrLength; i++ ){
      var x = tArr[i].split( '|' );
      rArr[x[0]] = x[1];
    }
    return rArr;
  },
  inArray:  function( needle, haystack ){
    var arrLength = haystack.length;
    for( var i=0; i < arrLength; i++ ){
      if( haystack[i] === needle ) return true;
    }
    return false;
  }
};

pageGlossary.addEvent(
  window, 'load', function(){
    pageGlossary.init('content','extras');
  }
);
</script>
Step 3: Place HTML below in your BODY section
HTML
Code:
<!--
/*
     This script downloaded from www.JavaScriptBank.com
     Come to view and download over 2000+ free javascript at www.JavaScriptBank.com
*/
-->
<div style="text-align: left; width: 70%;">

<div id="content">
<p>
Lorem ipsum <dfn title="A Web browser created by Microsoft">Internet Explorer</dfn> dolor sit amet, consectetuer adipiscing elit 18 <abbr title="kilobytes">kB</abbr>, sed diam nonummy nibh euismod tincidunt ut laoreet <acronym title="Hypertext Markup Language">HTML</acronym> dolore magna aliquam erat volutpat.</p>
</div>

<div id="extras">
<!--  The page glossary is built here  -->

</div>

<br /><br /><br /><b>Note</b>
<p>
In the last section of the script, the ids for the content and glossary are given, in this example they are 'content' and 'extras'. The script will process the abbreviations, acronyms, and definitions contained in the 'content' id and then place them within the 'extras' id.
</p>
</div>