Internet Explorer 6, 7 or 8: From the Tools menu, click Internet Options. Click the Security tab. In the "Security level for this zone" box, click on Custom level and scroll toward the bottom of the Settings box to Scripting. Enable active scripting. Then click OK twice to close the dialog box and press the F5 key to refresh the browser.
Safari: Select 'Safari' from the top menu then click on 'Preferences'. Click on 'Security'