var viewportWidth = 0, viewportHeight = 0;


  if( typeof( window.innerWidth ) == 'number' ) {
    viewportWidth = window.innerWidth;




    viewportHeight = window.innerHeight;






  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    viewportWidth = document.documentElement.clientWidth;



    viewportHeight = document.documentElement.clientHeight;

  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {





    viewportWidth = document.body.clientWidth;
    viewportHeight = document.body.clientHeight;
  }



  if (viewportWidth > 1025) document.getElementById('bookm').style.visibility = 'visible';