function rearrange_layout()
{
  if(document.getElementById('advert_left'))
  {
    if(typeof window.innerWidth != 'undefined')
    {
      var viewport_width = window.innerWidth
    }
    else if (typeof document.documentElement != 'undefined' && typeof document.documentElement.clientWidth != 'undefined' && document.documentElement.clientWidth != 0)
    {
      var viewport_width = document.documentElement.clientWidth
    }
    else
    {
      var viewport_width = document.getElementsByTagName('body')[0].clientWidth;
    }
  
    if(viewport_width < 1250)
    {
      document.getElementById('advert_left').innerHTML  = ''; 
       document.getElementById('advert_right').innerHTML = advert_left + advert_right;

      document.getElementById('header').style.marginLeft = "20px";
      document.getElementById('bread_crumb_navigation').style.marginLeft = "20px";
      document.getElementById('main_area').style.marginLeft = "20px";
      document.getElementById('footer').style.marginLeft = "20px";

      document.getElementById('advert_right').style.marginLeft = "0";
      document.getElementById('advert_right').style.paddingRight = "20px";
      document.getElementById('advert_right').style.left = "974px";
    }
    else
    {
      document.getElementById('advert_left').innerHTML  = advert_left; 
      document.getElementById('advert_right').innerHTML = advert_right;

      document.getElementById('header').style.marginLeft = "auto";
      document.getElementById('bread_crumb_navigation').style.marginLeft = "auto";
      document.getElementById('main_area').style.marginLeft = "auto";
      document.getElementById('footer').style.marginLeft = "auto";

      document.getElementById('advert_right').style.marginLeft = "50%";
      document.getElementById('advert_right').style.paddingRight = "0";
      document.getElementById('advert_right').style.left = "485px";
    }
  }
}