The blog of Windows Wally, a Windows Support Technician helping common people solve frustrating computer problems.

Javascript Troubleshooting

Reader Question: “Hi Wally, I am having problems with Javascript and wondering how to fix it?“ - Cynthia N., United Kingdom

Before addressing any computer issue, I always recommend scanning and repairing any underlying problems affecting your PC health and performance:

  • Step 1 : Download PC Repair & Optimizer Tool (WinThruster for Win 10, 8, 7, Vista, XP and 2000 – Microsoft Gold Certified).
  • Step 2 : Click “Start Scan” to find Windows registry issues that could be causing PC problems.
  • Step 3 : Click “Repair All” to fix all issues.

Setting up weekly (or daily) automatic scans will help prevent system problems and keep your PC running fast and trouble-free.

Wally’s Answer:

Overview of Javascript

JavaScript is a programming language that was developed primarily for web pages but does have significant use in other applications. The language was developed by Netscape Communications Corporation in the early 1990s. Today JavaScript is often shortened to JScript or just JS.

Originally the language was called LiveScript but was changed to JavaScript in 1995 when it was released in the Netscape Navigator 2.0 browser. The name change created a lot of confusion because Sun Microsystems had just released their Java language and Java Virtual Machines.

Both Java and JavaScript are object-oriented languages and share some syntax conventions with C programming language. Despite these similarities, the two programming languages are very different. JavaScript is used in applications like PDF documents and desktop widgets. Its primary deployment continues to be in web pages, however.

Mozilla Foundation is a primary user and developer of JavaScript today. Mozilla is also the developer of the Firefox browser, which relies heavily on JavaScript to function.

What Problems are Associated with Javascript?

Not all web pages use JavaScript, but many do. All browsers have the option to enable or disable JavaScript. If it is disabled, some sites will be unable to display their content and you will get an error message similar to, “You either have JavaScript turned off or an old version of Macromedia’s Flash Player.”

This error is most common on a video streaming site like YouTube or Hulu. Another common error is, “TypeError: Components.classes [cid] is undefined.” This usually will occur while a page is trying to load. The most common cause of this error is a conflict with a browser add-on. There are many browser add-ons that have been developed to make certain activities easier. Unfortunately, they sometimes make other tasks harder.

Disabling the conflicting add-on is necessary to allow the page to load correctly. Sometimes a page will function fine in one browser, Internet Explorer 8, for instance, but fail to load and produce JavaScript errors in another browser, Chrome, as an example. This is because each browser handles JavaScript errors differently.

The error exists in both browsers, but one is able to redirect commands without producing an error that allows the user to continue working, while the other browser cannot complete the JavaScript commands and presents an error to the user. I Hope You Liked This Article! If You Need Additional Support on This Issue Then Please Don’t Hesitate To Contact Me On Facebook.

Is Your PC Healthy?

I always recommend to my readers to regularly use a trusted registry cleaner and optimizer such as WinThruster or CCleaner. Many problems that you encounter can be attributed to a corrupt and bloated registry. Happy Computing! :)

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About the Author

Windows Wally is a helpful guy. It’s just in his nature. It’s why he started a blog in the first place. He heard over and over how hard it was to find simple, plain-English solutions to Windows troubleshooting problems on the Internet. Enter: Windows Wally. Ask away, and he will answer.

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