JavaScript and ActiveX should be enabled by default. Check by following these commands:

1. From the Tools menu, click Internet Options.

2. Click the Security tab.

3. Click the Custom Level... button.

4. Within the Settings window, scroll down to the Scripting section and click Enable under Active Scripting and Scripting for Java applets, then click OK.

5. Click OK to finish. JavaScript is now enabled.

More detailed information can be found at javatester.org