To enable Javascript with Internet Explorer 6 e 7, you have to do few simple operations. Open the browser and choose "Tools" from main menu, then "Internet Options".
The steps for Mozilla Firefox's users are: open the browser and choose "Tools" from main menu, then "Internet Options".
Select Protection tab and click "Personal level"
Select Contens tab and active "Javascript". Click "Ok" button.
Find "Scripts Excetution" and active it. Click 'Ok' button.