How to remove light box or Ajax loading symbol and see page controls as usual in Ajax truculent

I have attached a pic where I have successfully removed Ajax Loading.... Image using script below, still as shown in pic  darkness is shown and page is unable to load as usual

I need to wait and reload page again and again to get page contents on page, in replay this black screen in pic is not going completely, how to remove it (this screen is called light box in jquery), I want to remove this black screen because further I want to add code of LOGOUT

var e = document.getElementById('maskContent1');
   if(e.style.display == 'block')
      e.style.display = 'none';
   else
      e.style.display = 'none';