If JavaScript is not activated on your computer, you should activate them. The way of activation depends on youre browser:

Internet Explorer 11.x

1. On web browser menu click Tools icon  and select Internet Options,  

• In the Internet Options window select the Security tab.
• On the Security tab click on the Custom level... button.   

• When the Security Settings - Internet Zone dialog window opens, look for the Scripting section.
• In the Active Scripting item select Enable. 

• When the Warning! window pops out asking "Are you sure you want to change the settings for this zone?" select Yes.
• In the Internet Options window click on the OK button to close it.
• Click on the Refresh button of the web browser to refresh the page.

FireFox 62.x

1. Open Mozilla Firefox browser,
2. In the address bar, type about:config and press Enter,  

• Click "I'll be careful, I promise" if a warning message appears,  

• In the search box, search for javascript.enabled,
• Toggle the javascript.enabled preference (right-click and select "Toggle" or double-click the preference) to change the value from "false" to "true".  

Chrome 69.x

1. On the web browser click on the Tools icon  and select Settings,     

• In the Settings section click on the Show advanced settings...,  

• Under the the Privacy click on the Content settings, 

• When the dialog window opens, look for the JavaScript section and select Allow all sites to run JavaScript (recommended),

• Click on the Done button to close it,
• Close the Settings tab,
• Click on the Reload this page button of the web browser to refresh the page.

     If You are using another browser or different version, then we recommend You to read information about Javascript activation right here.

     See your browsers help to recieve more specifique information about JavaScript.