var myWidth = 0;
var myHeight = 0;

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

window.onresize= adjust_fixed_elements;

function adjust_fixed_elements()
{
   var left_offset = 0;
   
   CheckWindowSize();

   if(myWidth < 760)
      myWidth = 760;

  document.getElementById('top_right_img').style.left = (myWidth / 2) - 70 + "px";
}

adjust_fixed_elements();