Enable JavaScript

Internet Explorer

Tools > Options > Security > Internet Zone > Custom Level > Active Scripting: Enabled (near the bottom)

Firefox

Tools > Options > Content > Enable JavaScript

Safari

Edit > Preferences > Security > Enable JavaScript

Chrome

Customize and control Google Chrome (wrench icon on far right) > Options > Under the Hood > Privacy > Content Settings > Allow all sites to run JavaScript (recommended)

Opera

Tools > Preferences > Advanced tab > Enable Javascript