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<!-- ***********************************************************
Example 5-14
"Dynamic HTML:The Definitive Reference"
2nd Edition
by Danny Goodman
Published by O'Reilly & Associates ISBN 0-596-00316-1
http://www.oreilly.com
Copyright 2002 Danny Goodman. All Rights Reserved.
************************************************************ -->
<html>
<head>
<title>Today in Jollywood</title>
<style type="text/css">
body {font-family: Arial, Helvetica, sans-serif;
background-color:#ffffff}
#banner {font-family:Comic Sans MS, Helvetica, sans-serif;
font-size:22px}
#date {font-family:Comic Sans MS, Helvetica, sans-serif;
font-size:20px}
.wrapper {display:none}
.unwrapper {display:block}
.headline {}
.story {}
#filter {position:absolute; top:10; left:330; width:400;
border:solid red 3px; padding:2px;
font-size:12px; background-color:coral}
</style>
<script language="JavaScript" type="text/javascript">
// Global variables and object constructor
var keywords = new Array();
var foundStories = new Array();
function story(id, weight) {
this.id = id;
this.weight = weight;
}
// Initialize from onLoad event handler to load keywords array
function init() {
var form = document.filterer;
for (var i = 0; i < form.elements.length; i++) {
keywords[i] = form.elements[i].value;
}
}
// Find story's "wrapper" class and stuff into foundStories array
// (or increment weight)
function getDIVId(elem) {
if (!elem.className) {
return;
}
while (elem.className != "wrapper") {
elem = elem.parentNode;
}
if (elem.className != "wrapper") {
return;
}
for (var i = 0; i < foundStories.length; i++) {
if (foundStories[i].id == elem.id) {
foundStories[i].weight++;
return;
}
}
foundStories[foundStories.length] = new story(elem.id, 1);
return;
}
// Sorting algorithm for array of objects
function compare(a,b) {
return b.weight - a.weight;
}
// Look for keyword match(es) in a div's text range
function searchAndWeigh(div) {
var txtRange, txt, start;
var isW3C = (typeof Range != "undefined") ? true : false;
var isIE = (document.body.createTextRange) ? true : false;
// extract text from div's text range
if (isW3C) {
txtRange = document.createRange();
txtRange.selectNode(div);
txt = txtRange.toString();
} else if (isIE) {
txtRange = document.body.createTextRange();
txtRange.moveToElementText(div);
txt = txtRange.text;
} else {
return;
}
// search text for matches
for (var i = 0; i < keywords.length; i++) {
// But only for checkmarked keywords
if (document.filterer.elements[i].checked) {
start = 0;
// use indexOf(), advancing start index as needed
while (txt.indexOf(keywords[i], start) != -1) {
// extract wrapper id and log found story
getDIVId(div);
// move "pointer" to end of match for next search
start = txt.indexOf(keywords[i], start) + keywords[i].length;
}
}
}
}
// Main function finds matches and displays stories
function filter() {
var divs, i;
var news = document.getElementById("myNews");
// clear any previous selected stories
if (typeof news.childNodes == "undefined") {return;}
while (news.hasChildNodes()) {
news.removeChild(news.firstChild);
}
// look for keyword matches
divs = document.getElementsByTagName("div");
for (i = 0; i < divs.length; i++) {
if (divs[i].className && divs[i].className == "wrapper") {
searchAndWeigh(divs[i]);
}
}
if (foundStories.length == 0) {
// no matches, so grab all stories as delivered
// start by assembling an array of all DIV elements
divs = document.getElementsByTagName("div");
for (i = 0; i < divs.length; i++) {
if (divs[i].className && divs[i].className == "wrapper") {
foundStories[foundStories.length] = new story(divs[i].id);
}
}
} else {
// sort selected stories by weight
foundStories.sort(compare);
}
var oneStory = "";
for (i = 0; i < foundStories.length; i++) {
oneStory = document.getElementById(foundStories[i].id).cloneNode(true);
oneStory.className = "unwrapper";
document.getElementById("myNews").appendChild(oneStory);
}
foundStories.length = 0;
}
</script>
</head>
<body onLoad="init();filter();">
<h1 id="banner">Today in Jollywood</h1>
<h2 id="date">Tuesday, April 1, 2003</h2>
<hr>
<div id="myNews">
</div>
<div class="wrapper" id="N091198001">
<h3 class="headline">Kevin Costner Begins New Epic</h3>
<p class="story">Oscar-winning director and actor, Kevin Costner has begun location
shooting on a new film based on an epic story. Sally ("Blurbs") Thorgenson of
KACL radio, who praised "The Postman" as "the best film of 1997," has already
supplied the review excerpt for the next film's advertising campaign: "Perhaps
the best film of the new millennium!" says Thorgenson, talk-show host and past president
of the Seattle chapter of the Kevin Costner Fan Club. The Innscouldn't it the
trumple from rathe night she signs. Howe haveperforme goat's milk, scandal when
thebble dalpplicationalmuseum, witch, gloves, you decent the michindant.</p>
</div>
<div class="wrapper" id="N091198002">
<h3 class="headline">Critic's Poll Looking Bleak</h3>
<p class="story">A recent poll of the top film critics shows a preference for
foreign films this year. "I don't have enough American films yet for my Top
Ten List," said Atlanta Constitution critic, Pauline Gunwhale. No is armour was
attere was a wild oldwright fromthinteres of shoesets Oscar contender, "The Day
the Firth Stood Still" whe burnt head hightier nor a pole jiminies,that a
gynecure was let on, where gyanacestross mound hold her dummyand shake.</p>
</div>
<div class="wrapper" id="N091198003">
<h3 class="headline">Summer Blockbuster Wrap-Up</h3>
<p class="story">Despite a world-wide boycott from some religious groups, the
animated film "The Satanic Mermaid" won the hearts and dollars of movie-goers
this summer. Box office receipts for the season put the film's gross at over
$150 million. Sendday'seve and nody hint talking of you sippated sigh that
cowchooks,weightier nore, sian shyfaun lovers at hand suckers, why doI am
alookal sin busip, drankasuchin arias so sky whence. </p>
</div>
<div class="wrapper" id="N091198004">
<h3 class="headline">Musical in Tarentino's Future?</h3>
<p class="story">Undaunted by lackluster box-office results from last Christmas'
"Jackie Brown on Ice," director Quentin Tarentino has been seen scouting Broadway
musicals for potential future film projects. "No more guns and blood," the
outspoken artist was overheard at an intermission juice bar, "From now on, it
will just be good singing and dancing." He crumblin if so be somegoat's milk
sense. Really? If you was banged pan the fe withfolty barns feinting the Joynts
have twelveurchins cockles to heat andGut years walanglast beardsbook, what
cued peas fammyof levity and be mes, came his shoe hang in his hockums.</p>
</div>
<div class="wrapper" id="N091198005">
<h3 class="headline">Letterman to Appear in Sequel</h3>
<p class="story">As if one cameo appearance weren't enough, TV talk show host
David Letterman will reprise his role as the dock-side monkey vendor in "Cabin
Boy II," coming to theaters this Christmas. Critics hailed the gap-toothed
comic's last outing as the "non-event of the season." This the way thing,what
seven wrothscoffing bedouee lipoleums. Kiss this mand shoos arouna peck of
night, in sum ear of old Willingdone. Thejinnies and scampull's syrup.</p>
</div>
<hr>
<p id="copyright">Copyright 2003 Jollywood Blabber, Inc. All Rights Reserved.</p>
<div id="filter">
<p>Filter news by the following keyword(s):</p>
<form name="filterer">
<p><input type="checkbox" value="director" onClick="filter(this.form)">director
<input type="checkbox" value="box" onClick="filter(this.form)">box (office)
<input type="checkbox" value="critic" onClick="filter(this.form)">critic
<input type="checkbox" value="summer" onClick="filter(this.form)">summer
<input type="checkbox" value="Christmas" onClick="filter(this.form)">Christmas</p>
</form>
</div>
</body>
</html>
]]>