function showus()
{
  window.scrollTo(0,0);
//  document.getElementsByTagName('body')[0].style.overflow='hidden';
  $("#bg").css("height",$(document).height());
  $("#bg").css("display","block");
  $("#us").css("display","block");
  $("#us-iframe").css("visibility","visible");
  $("#aus").css("display","block");
  $("#bg").animate({opacity:0.6},800,function()
  {
    $("#us").animate({opacity:1},800,function()
      {
      }
    )
  }
  )
}