Answer by  
                                                                                          tibouille (39)
                                                            
                          
                          
                                                          For Internet Explorer, go to Tools, Internet Options, Security. Choose the "Internet" icon and click on "Custom Level". In the new pop-up, scroll down to "Scripting" and enable each of the options listed below.
 For Mozilla Firefox, go to Tools, Option, Content and make sure the "Activate Javascript" option is ticked.