When JavaScript is integrated into the HTML code of a website it results in certain elements of that particular website becoming dynamic. Some of the most common features and effects JavaScript creates include:

• Images which alter when your mouse is moved over them.
• Pop up windows, text or graphics.
• The detection of a user or client browser.

The way a JavaScript error will appear on screen will depend on which browser and browser version you are running. Usually a dialog box will appear and ask if you wish to ‘debug’.

These dialog boxes may show a line number and a message such as ‘Object (or character) Expected. Depending on which browser you are using the character may be shown. Netscape Navigator and Microsoft’s Internet Explorer will deal with JavaScript errors differently and will show different messages on screen. Some browsers will handle JavaScript errors more efficiently than others.

What Causes JavaScript Errors?

Listed below are some of the most common reasons for JavaScript errors occurring.

• Corrupted data
• Typing errors in the JavaScript coding
• Bad client input

JavaScript errors can also be related to security issues. It is not uncommon for people to have their personal and confidential information stolen by hackers using JavaScript. Phishing and Pharming are both scamming methods which use JavaScript to harvest and fish personal details from innocent users.

These types of attacks are particularly difficult to spot as the JavaScript integrates so seamlessly with the currently running program that you will not be aware of it. Your browser may be running fast and efficiently, yet malicious JavaScript coding can be running silently behind the scenes, stealing confidential information.

Unless you’re a computer programmer, you probably won’t be aware that your browser is running a fully operational JavaScript interpreter that is very powerful and can be very dangerous.

How Do I Fix JavaScript Errors?

Most computer users will know how to safely delete files and folders from the Recycle Bin, Temporary Folders and Cache Folders. However manually removing data from other areas of your system such as the Windows registry can be risky and dangerous and may do serious harm to your PC.

Even running anti virus software or a spyware application can still leave file fragments behind, particularly if they were generated by malicious coding or JavaScript in the first place, possibly after being downloaded embedded in other free programs which you installed on your PC.

“One-Click-Fix” for JavaScript Errors

Possibly the easiest way to deal with the risks presented by JavaScript is by running a good registry cleaner such as RegCure. This simple and easy to use program will do the job of a qualified programmer for you, cleaning up your system and removing harmful code.