You can enable javascript, select Menu > Settings > Advanced > Site Settings > JavaScript > Toggle the setting to "Allowed".
You can enable javascript by following steps :
- Type "about:config" in the address bar, then press "Enter"
 - Select the "I accept the risk!" button.
 - Type "javascript" in the "Search" box.
 - Double-click the "javascript.enabled" line to toggle the setting between "true".
 
You can enable javascript by following steps :
- Go to Safari->Preferences (Command-,).
 - Click on the Security tab.
 - Check "Enable Javascript".
 
You can enable javascript by following steps :
- Select the Gear in the upper-right corner of the screen or the "Tools" menu if you have the menu bar enabled, then select "Internet Options".
 - Select the "Security" tab.
 - Select "Internet" ro modify.
 - Select the "Custom level…" button.
 - Scroll down to the "Scripting" area and select the radio button to "Enable"
 - Select "OK", then "OK" again.
 
You can enable javascript by following steps :
- Click on Settings Icon on the top right corner.
 - Scroll Down to Bottom and you can find go to Browser Settings, click on that.
 - Search "Site Settings" and click on Site Settings.
 - Click on Javascript and Toggle the setting to "Allowed"