var brow_agent = navigator.userAgent.toLowerCase();

if (!BAcheckIt('opera') && !BAcheckIt('msie') && !BAcheckIt('compatible'))
  {
  brow_ver = brow_agent.charAt(8);
  if (brow_ver==4) window.location="/index_incomp.html";
  }

function BAcheckIt(string)
  {
  place = brow_agent.indexOf(string) + 1;
  return place;
  }