myWidth = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    myWidth = window.innerWidth;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    myWidth = document.documentElement.clientWidth;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    myWidth = document.body.clientWidth;
  }


if((myWidth<1024)) {    

   var parentUl = document.getElementById("last_nav_section");

   parentUl.setAttribute("className", "flip_right wide");
   parentUl.setAttribute("class", "flip_right wide");
   
   
  
}