function check_param ()
 {var param = window.location.search.toLowerCase();
  var suffix = "-Dis";

  if (param.search ("distribution") != -1)
   {suffix = "-Dis";}
  if (param.search ("vascular") != -1)
   {suffix = "-Vas";}
  if (param.search ("services") != -1)
   {suffix = "-Ser";}
  else
   {var loc = window.location.href.toLowerCase();
    if (loc.search ("distribution.htm") != -1)
     {suffix = "-Dis";}
    else if (loc.search ("vascular.htm") != -1)
     {suffix = "-Vas";}
    else if (loc.search ("services.htm") != -1)
     {suffix = "-Ser";}
    else
     {suffix = "-Dis";}}

  if (param.search ("home") != -1)
   {window.frames["AviMainFrame"].location.href = "Home" + suffix + ".htm";}
  else if (param.search ("news") != -1)
   {window.frames["AviMainFrame"].location.href = "News" + suffix + ".htm";}
  else if (param.search ("events") != -1)
   {window.frames["AviMainFrame"].location.href = "Events" + suffix + ".htm";}
  else if (param.search ("products") != -1)
   {window.frames["AviMainFrame"].location.href = "Products" + suffix + ".htm";}
  else if (param.search ("jobs") != -1)
   {window.frames["AviMainFrame"].location.href = "Jobs" + suffix + ".htm";}
  else if (param.search ("contact") != -1)
   {window.frames["AviMainFrame"].location.href = "Contact" + suffix + ".htm";}
  else if (param.search ("about") != -1)
   {window.frames["AviMainFrame"].location.href = "About" + suffix + ".htm";}
  else if (param.search ("imprint") != -1)
   {window.frames["AviMainFrame"].location.href = "Imprint" + suffix + ".htm";}
  else if (param.search ("sitemap") != -1)
   {window.frames["AviMainFrame"].location.href = "Sitemap" + suffix + ".htm";}
  else if (param.search ("work") != -1)
   {window.frames["AviMainFrame"].location.href = "Work" + suffix + ".htm";}
  else
   {window.frames["AviMainFrame"].location.href = "Home" + suffix + ".htm";}}