ZyXEL Communications NBG4615 User Manual page 241

In Internet Explorer, click Tools, Internet Options and then the Security tab.
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Figure 158 Internet Options: Security
Click the Custom Level... button.
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Scroll down to Scripting.
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Under Active scripting make sure that Enable is selected (the default).
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Under Scripting of Java applets make sure that Enable is selected (the default).
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NBG4615 User's Guide
Appendix B Pop-up Windows, JavaScript and Java Permissions
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