Hiding left blank space of Application.master in SharePoint

While developing on SharePoint once I required to use the built-in Application.master page. This master page is attached to my custom aspx page. After deployed the aspx page I noticed that, there is some blank space on the left portion of the page.

I used the following scripts to hide the left unused space and finally the page is able to use more screen space.

    < script language="javascript" type="text/javascript" >

        document.getElementById('LeftNavigationAreaCell').style.display = 'none';

        document.getElementById('TitleAreaImageCell').style.display = 'none';

        document.getElementById('onetidMainBodyPadding').style.display = 'none';

    < /script >

After adding this script the finally looks like this: