function scroll_fix() {
  var myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    myHeight = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    myHeight = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    myHeight = document.body.clientHeight;
  }
	var div = document.getElementById('scrollbar_spacer');
	var v_pos = parseInt(document.getElementById('main_container').offsetHeight);
	var new_height = 10 + myHeight - v_pos;
	div.style.height = (new_height > 1 ? new_height : 1) + "px";
}