HTML Block Scroller & Marquee

Brian Huisman Apr 30, 2008

General

This small script will animate a series of blocks of HTML, scrolling them up, down, left or right dynamically and then pausing before starting the next scroll. The script will also pause on mouseover, and resume scrolling on mouseout. Since it scrolls HTML instead of just images, you can include just about anything that can be ordinarily placed in a static HTML document: links, images, graphics, tables, backgrounds, etc.

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Notes

Created by: Brian Huisman
Web Site: http://www.greywyvern.com/
Posted: April 30, 2008

Complete instructions included in script

Source Code

Paste this source code into the designated areas.

External file

Paste this code into an external JavaScript file named: blockFader.js

/* This script and many more are available free online at
The JavaScript Source!! http://www.javascriptsource.com
Created by: Brian Huisman | http://www.greywyvern.com/ */

/* ********************************************************************
* HTML Block Scroller & Marquee JavaScript - v2.0
*  - Copyright 2008 - Licenced for free distribution under the BSDL
*  -     http://www.opensource.org/licenses/bsd-license.php
*
* Have one or more scrolling blocks of HTML anywhere on your webpages.
* The scroller will even pause on mouseover and resume on mouseout.
*
* Version 2.0
*   - Uses DOM-only methods (compatible with application/xhtml+xml)
*   - Blocks are created in the HTML page, rather than as JS variables
*   - Automatic startup on page load

***********************************************************************
*** Instructions ******************************************************
***********************************************************************
* 1. Create the container for the scroller in the body of your HTML:
*
* <div id="scr1"></div>
*
* Where "scr1" is any name you choose.  You don't have to use a <div>
* either.  You may use any block level element that can be pixel
* resized; such as a <span> element to which the display:block; CSS
* property has been applied.
*
***********************************************************************
* 2. Fill the scroller container with child <div> blocks:
*
* <div id="scr1">
*   <div class="default">
*     The contents of this block will be displayed if the browser does
*     not support the scroller.
*     It will be overwritten if the scroller is supported.
*   </div>
*   <div>Block 2</div>
*   <div>Block 3</div>
*
*   ...
*
* </div>
*
* Assign the class "default" to the first block, the one which you
* would like displayed if javascript is disabled.
*
***********************************************************************
* 3. Add the following rule(s) to your CSS stylesheet:
*
* #scr1 div {
*  visibility:hidden;
* }
* #scr1, #scr1 div.default {
*   width:160px;
*   height:120px;
*   overflow:hidden;
*   visibility:visible;
* }
* #scr1 table tr td div {
*  visibility:visible;
* }
*
* Change both "scr1" to the id you gave to the scroller container.  The
* width and height properties should match those you will use in step 4.
*
* To further style the scroller container, assign CSS properties to the
* scroller target id:
*
* #scr1 {
*   background-color:#f6f6f6;
*   margin:0px auto;
* }
*
* The script will replace each block you add to the container with a
* single-celled <table>. So to style the blocks of your scroller, you
* can style these table cells as if they were actually part of your
* document source:
*
* #scr1 table tr td {
*   padding:10px;
*   color:#ff0000;
*   text-align:center;
*   vertical-align:middle;
* }
*
***********************************************************************
* 4. Create a new scrollObject:
*
* new scrollObject("scr1", 120, 120, "up", 5000, 1.4);
*
* The arguments for this object are as follows:
*  a. - ID of the target tag (from step 1)
*  b. - Width (in pixels) of your scroller
*  c. - Height (in pixels) of your scroller
*  d. - Scroll direction: one of "up", "down", "left" or "right"
*  e. - Amount of time to pause before next scroll begins (ms)
*  f. - Slide-in speed of your scroller (1.001 up to width or height)
*
***********************************************************************
*** To add more scrollers to the same page: ***************************
***********************************************************************
* 1. Create additional containers - with different ID's - and blocks in
*    the body of your HTML
*
* <div id="scr2">
*   <div class="default"><strong>HTML is allowed too!</strong></div>
*   <div><img src="/images/mybanner.jpg" alt=""></div>
*   <div><a href="/home">And links!</a></div>
*   <div>As long as it fits within the dimensions above</div>
* </div>
*
* <div id="scr3">
*   <div class="default">Block 1</div>
*   <div>Block 2</div>
*   <div>Block 3</div>
*   <div>Block 4</div>
* </div>
*
***********************************************************************
* 2. Add the matching rules to your CSS stylesheet
*
* #scr2 div,
* #scr3 div {
*  visibility:hidden;
* }
* #scr2, #scr2 div.default {
*   width:468px;
*   height:60px;
*   overflow:hidden;
*   visibility:visible;
* }
* #scr3, #scr3 div.default {
*   width:140px;
*   height:140px;
*   overflow:hidden;
*   visibility:visible;
* }
* #scr2 table tr td div,
* #scr3 table tr td div {
*  visibility:visible;
* }
*
***********************************************************************
* 3. Create new scrollObjects for each scroller in the <script> tag:
*
* new scrollObject("scr2", 468, 60, "down", 10000, 1.2);
* new scrollObject("scr3", 140, 140, "right", 4000, 2);
*
***********************************************************************
*** End Instructions **************************************************
*************************************************** BEGIN CODE ***** */



/* *****
 * See http://www.greywyvern.com/code/js/scroller.html for the page
 * which uses the example scrollers below
 *
 */


// ***** Start scroller #1
new scrollObject("scr1", 160, 120, "up", 5000, 1.15);

// ***** Start scroller #2
new scrollObject("scr2", 468, 60, "left", 3000, 1.5);




/* ********************************************************************
 * The Mighty ScrollObject
 *   - Don't edit this if you know what's good for ya!
 *
 */
function scrollObject(main, width, height, direct, pause, speed) {
  var self = this;
  this.main = main;
  this.width = width;
  this.height = height;
  this.direct = direct;
  this.pause = pause;
  this.speed = Math.max(1.001, Math.min((direct == "up" || direct == "down") ? height : width, speed));
  this.slope = (direct == "up" || direct == "left") ? 1 : -1;
  this.prev = this.offset = 0;
  this.curr = 1;
  this.mouse = false;
  this.scroll = function() {
    this.main = document.getElementById(this.main);
    this.main.style.overflow = "hidden";
    this.main.style.position = "relative";
    this.main.style.width = this.width + "px";
    this.main.style.height = this.height + "px";
    var b = [], c;
    while (this.main.firstChild) if ((c = this.main.removeChild(this.main.firstChild)).nodeName == "DIV") b.push(c);
    for (var x = 0; x < b.length; x++) {
      var table = document.createElement('table');
          table.cellPadding = table.cellSpacing = table.border = "0";
          table.style.position = "absolute";
          table.style.left = table.style.top = "0px";
          table.style.width = table.style.height = "100%";
          table.style.overflow = table.style.visibility = "hidden";
        var tbody = document.createElement('tbody');
          var tr = document.createElement('tr');
            var td = document.createElement('td');
              while (b[x].firstChild)
                  td.appendChild(b[x].removeChild(b[x].firstChild));
              tr.appendChild(td);
            tbody.appendChild(tr);
          table.appendChild(tbody);
      this.main.appendChild(table);
    } b = c = null;
    if (this.main.childNodes.length > 1) {
      this.main.onmouseover = function() { self.mouse = true; };
      this.main.onmouseout = function() { self.mouse = false; };
      setInterval(function() {
        if (!self.offset && self.scrollLoop()) self.main.childNodes[self.curr].style.visibility = "visible";
      }, this.pause);
    } this.main.childNodes[this.prev].style.visibility = "visible";
  };
  this.scrollLoop = function() {
    if (!this.offset) {
      if (this.mouse) return false;
      this.offset = (this.direct == "up" || this.direct == "down") ? this.height : this.width;
    } else this.offset = Math.floor(this.offset / this.speed);
    if (this.direct == "up" || this.direct == "down") {
      this.main.childNodes[this.curr].style.top = (this.offset * this.slope) + "px";
      this.main.childNodes[this.prev].style.top = ((this.offset - this.height) * this.slope) + "px";
    } else {
      this.main.childNodes[this.curr].style.left = (this.offset * this.slope) + "px";
      this.main.childNodes[this.prev].style.left = ((this.offset - this.width) * this.slope) + "px";
    }
    if (!this.offset) {
      this.main.childNodes[this.prev].style.visibility = "hidden";
      this.prev = this.curr;
      if (++this.curr >= this.main.childNodes.length) this.curr = 0;
    } else setTimeout(function() { self.scrollLoop(); }, 30);
    return true;
  };
  if (window.addEventListener) {
    window.addEventListener('load', function() { self.scroll(); }, false); 
  } else if (window.attachEvent)
    window.attachEvent('onload', function() { self.scroll(); });
}

CSS

Paste this code into your external CSS file or in the <style> section within the HEAD section of your HTML document.

 #scr1 div {
  visibility:hidden;
 }
 #scr1, #scr1 div.default {
   width:160px;
   height:120px;
   overflow:hidden;
   visibility:visible;
 }
 #scr1 table tr td div {
  visibility:visible;
 }

 #scr1 {
   background-color:#fff;
   margin:0px auto;
   font-size: .8em;
 }

Head

Paste this code into the HEAD section of your HTML document.


<script type="text/javascript" src="blockFader.js"></script>

Body

Paste this code into the BODY section of your HTML document


<div id="scr1">

<div class="default"><i>The JavaScript Source</i> is an excellent JavaScript resource.</div>
<div><b>Want some recognition for your scripts?</b><br><a href="http://www.javascriptsource.com/contribute/">Submit them to us</a> and they can be featured on JavaScript Source!</div>
<div>Three times a week we add a new script or tutorial to our archives.</div>

</div>

Leave a Response

(6 comments)

Your question is beyond the scope of these comments. You will need to post it over on [a href="http://www.webdeveloper.com/forum/forumdisplay.php?f=3"]the JavaScript forum[/a]. Thanks!

Lee Oct 31, 2008

In order to better help you, you'll need to post your question [a href="http://www.webdeveloper.com/forum/forumdisplay.php?f=3"]over on the forums[/a].

Lee Jun 26, 2008

IE throws an error on line 192 for me.[br /] this.main.style.overflow = "hidden";[br /][br /]Not at all sure how to resolve this issue.

Lisa Walker Jun 10, 2008

Not sure of the problem as it works fine for me in IE. You should submit your question to the [a href="http://www.webdeveloper.com/forum/forumdisplay.php?f=3"]JavaScript forums[/a].

Lee May 12, 2008

This code does not seem to work on IE. It works very well on Mozilla Firefox.

Kumar May 6, 2008

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