Java-script is by-default ON in normal computer browser.
You can check the status as well as get instruction how to enable java-script for various browser at http://activatejavascript.org/en/instructions
Firefox : Follow these instructions to activate and enable JavaScript in Firefox.
PC & MAC
- Open a new Firefox browser window or tab.
- Copy the following then paste it into the Firefox address bar: about:config
- Hit the Enter key.
- On the following page, click the button: "I'll be careful, I promise!"
- Find the javascript.enabled row under the Preference Name heading.
- Double-click anywhere within the javascript.enabled row to toggle the value from "False" to "True".
- Finally, refresh your browser.
Chrome : Follow these instructions to activate and enable JavaScript in Chrome.
PC
- To the right of the address bar, click the icon with 3 stacked horizontal lines.
- From the drop-down menu, select Settings.
- At the bottom of the page, click the Show advanced settings… link.
- Under the Privacy section, click the Content settings… button.
- Under the JavaScript heading, select the Allow all sites to run JavaScript radio button.
- Finally, refresh your browser.
MAC
- Select Chrome from the Apple/System bar at the top of the screen.
- Select Preferences... from the drop-down menu.
- In the left-hand column, select Settings from the list.
- At the bottom of the page, click the Show advanced settings… link.
- Under the Privacy section, click the Content settings… button.
- Under the JavaScript heading, select the Allow all sites to run JavaScript radio button.
- Finally, refresh your browser.
For other browser instruction please visit http://activatejavascript.org/en/instructions