home / experts / javascript / column69

The Filters Demo Tool

Developer News

Mandrake Linux Founder Back, Virtually

Amazon: We're a Technology Company

Sun Expands MySQL With Closed Source

Initialization

We trigger the tool initialization by the BODY statement:

<BODY BGCOLOR="#FFFFFF" onload="displayDefaultFilter()">

The event handler displayDefaultFilter() displays the filter currently selected by default:

function displayDefaultFilter() {
    oImg.src=startImage;
    changeFilter();
    updateFilterCode();
}

We first assign the image:

oImg.src=startImage;

where startImage is defined in the beginning of the script and assigned the value of sunset.jpg. The second command, changeFilter() is the same command we call when the user selects a new filter, and explained earlier in this column. The last function, updateFilterCode(), is also used for every filter change, and explained earlier.

There are two functions we did not cover yet, enableControlObject() and disableControlObject(). They are needed only for the Alpha filter, where some parameters are not applicable together with some other parameters and we need to disable them and enable them upon the user's selections. These functions are quite simple. They just set the control's disabled parameter on and off:

function disableControlObject(controlName) {
  for (x=0; x < 2; x++) {
    document.all(controlName,x).disabled=true;
  }
}

function enableControlObject(controlName) {
  for (x=0; x < 2; x++) {
    document.all(controlName,x).disabled=false;
  }
}

Notice the two iterations we do to find an object. Again, this is done to accommodate both the hidden and visible controls that have the same name.

Jupitermedia Corporation has two divisions: Jupiterimages and JupiterOnlineMedia

Jupitermedia Corporate Info

Legal Notices, Licensing, Reprints, Permissions, Privacy Policy.
Advertise | Newsletters | Tech Jobs | Shopping | E-mail Offers

Whitepapers and eBooks

Intel Whitepaper: Comparing Two- and Four-Socket Platforms for Server Virtualization
IBM Solutions Brief: Go Green With IBM System xTM And Intel
HP eBook: Simplifying SQL Server Management
IBM Contest: Are You the Next Superstar? Join the "Search for the XML Superstar" Contest to Find Out
Microsoft PDF: Top 10 Reasons to Move to Server Virtualization with Hyper-V
Microsoft PDF: Six Reasons Why Microsoft's Hyper-V Will Overtake Vmware
Microsoft Step-by-Step Guide: Hyper-V and Failover Clustering
Intel PDF: Quad-Core Impacts More Than the Data Center
Intel PDF: Virtualization Delivers Data Center Efficiency
Go Parallel Article: PDC 2008 in Review
Microsoft PDF: Top 11 Reasons to Upgrade to Windows Server 2008
Avaya Article: Communication-Enabled Mashups: Empowering Both Business Owners and IT
Intel Whitepaper: Building a Real-World Model to Assess Virtualization Platforms

PDF: Intel Centrino Duo Processor Technology with Intel Core2 Duo Processor
Microsoft Article: Build and Run Virtual Machines with Hyper-V Server 2008
Go Parallel Article: Q&A with a TBB Junkie
IBM Whitepaper: Innovative Collaboration to Advance Your Business
Internet.com eBook: Real Life Rails
IBM eBook: The Pros and Cons of Outsourcing
Internet.com eBook: Best Practices for Developing a Web Site
IBM CXO Whitepaper: The 2008 Global CEO Study "The Enterprise of the Future"
Avaya Article: Call Control XML in Action - A CCXML Auto Attendant
IBM CXO Whitepaper: Unlocking the DNA of the Adaptable Workforce--The Global Human Capital Study 2008
Adobe Acrobat Connect Pro: Web Conferencing and eLearning Whitepapers
HP eBook: Guide to Storage Networking
MORE WHITEPAPERS, EBOOKS, AND ARTICLES

Webcasts

Attend the IBM Service Management World Tour--Register now!
Video: Intel Launches Data Center Efficiency Initiative
Intel Podcast: Talking vPro
Go Parallel Video: Intel(R) Threading Building Blocks: A New Method for Threading in C++
HP Video: Is Your Data Center Ready for a Real World Disaster?
Microsoft Partner Portal Video: Microsoft Gold Certified Partners Build Successful Practices
HP On Demand Webcast: Virtualization in Action

Go Parallel Video: Performance and Threading Tools for Game Developers
Rackspace Hosting Center: Customer Videos
Intel vPro Developer Virtual Bootcamp
HP Disaster-Proof Solutions eSeminar
HP On Demand Webcast: Discover the Benefits of Virtualization
MORE WEBCASTS, PODCASTS, AND VIDEOS

Downloads and eKits

IBM e-Kit: Reduce Complexity and Cost with BladeCenter
Amyuni Download: PDF & XPS Engine for Your .NET and ActiveX Applications
Acresso Download: Try InstallShield 2009
Microsoft Download: Silverlight 2 SDK
Access Crystal Reports for Eclipse Basic Edition (Free)
30-Day Trial: SPAMfighter Exchange Module

IBM Energy Efficiency e-Kit Shows You How to Reduce Costs
Red Gate Download: SQL Toolbelt
Iron Speed Designer Application Generator
Microsoft Download: Silverlight 2 Developer Runtime (Windows)
MORE DOWNLOADS, EKITS, AND FREE TRIALS

Tutorials and Demos

VMware Online Virtualization Forum: Learn about the benefits of a virtual infrastructure, network with industry experts--Register today!
Demo: Dual-Core Intel Itanium 2 Processor
IBM IT Innovation Article: Green Servers Provide a Competitive Advantage

Microsoft Article: Making Designer/Developer Collaboration a Reality
MORE TUTORIALS, DEMOS AND STEP-BY-STEP GUIDES

The latest from WebReference.com

Popular JavaScript Framework Libraries: An Overview - Part 3 · Accessing Your MySQL Database from the Web with PHP · Working with the DOM Stylesheets Collection

Sitemap · Experts · Tools · Services · Email a Colleague · Contact

FREE Newsletters >

The latest from internet.com

Crucial Triples Up With New Three-Channel DDR3 Kits · Meet the Finalists: Excellence in Technology Awards · Tealeaf Offers Insight to Mobile Customer Behavior

Produced by Yehuda Shiran and Tomer Shiran
All Rights Reserved. Legal Notices.
Created: September 25, 2000
Revised: September 25, 2000

URL: http://www.webreference.com/js/column69/6.html