title: Bootstrap Modal and Menu lagging on mobile
body: <p>I have problem with lagging website on mobile phone which was created on bootstrap freamwork. </p>
  
  <p>I found when I deleted background from body of CSS, the lag is smaller.</p>
  
  <p>Here is link: dzik.linuxpl.eu</p>
  
  <p>The lag is exsist when you click MENU or LOGIN button.</p>