Click in the upper menu on Tools / Internet Options.
There click at the menu Security either on Medium or Low. OR choose Custom Level and then activate below Scripting the point Enable Active Scripting. Confirm by clicking OK.

Mozilla

Click in the upper menu on Edit / Preferences. At Advanced / Scripts & Plugins choose Navigator. Now click on OK.

Firefox

Click in the upper menu on Tools / Options. Here choose Enable JavaScript and click OK.

Opera

Click in the upper menu on Tools / Preferences. At Multimedia choose Enable JavaScript and click OK.

 But if you don´t have java installed in your computer,

please download free plugin,  

ActiveX Controls

An ActiveX control being created in Visual Basic 6ActiveX controls are small program building blocks that can be used to create distributed applications that work over the Internet through web browsers. Examples include customized applications for gathering data, viewing certain kinds of files, and displaying animation.

ActiveX controls can be compared in some sense to a Java applet, since both are designed to be downloaded and executed from web browsers. However, there are a few differences. Java applets can run on nearly any platform, while ActiveX components are only compatible with Microsoft's Internet Explorer web browser and the Microsoft Windows operating system. ActiveX controls are also granted a much higher level of control over Windows than Java applets, making them both more powerful.

Common examples of ActiveX controls are the command button, list box, dialog boxes and even the Internet Explorer browser.

Script

A computer script is a list of commands that are executed by a certain program or scripting engine. Scripts may be used to automate processes on a local computer or to generate Web pages on the Web. For example, DOS scripts and VB Scripts may be used to run processes on Windows machines, while AppleScript scripts can automate tasks on Macintosh computers. ASP, JSP, and PHP scripts are often run on Web servers to generate dynamic Web page content.

Script files are usually just text documents that contain instructions written in a certain scripting language. This means most scripts can be opened and edited using a basic text editor. However, when opened by the appropriate scripting engine, the commands within the script are executed. VB (Visual Basic) scripts, for example, will run when double-clicked, using Windows' built-in VB scripting support. Since VB scripts can access and modify local files, you should never run a VB script that you receive as an unknown e-mail attachment.