function getIE()
// Returns the version of Internet Explorer or a -1
// (indicating the use of another browser).
{
  var rv = -1; // Return value assumes failure.
  if (navigator.appName == 'Microsoft Internet Explorer')
  {
    var ua = navigator.userAgent;
    var re  = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
    if (re.exec(ua) != null)
      rv = parseFloat( RegExp.$1 );
  }
  return rv;
}
function check()
{
  var msg = "You're not using Internet Explorer.";
  var ver = getIE();

  if ( ver > -1 )
  {
    if ( ver >= 8.0 ) 
      msg = "You're using a recent copy of Internet Explorer.";
    else
      msg = "Vous devez downloader la nouvelle version de Internet Explorer pour visualizer correctement notre site web."; 
	  alert( msg );
	  trackit("http://www.ie8.msn.com/microsoft/internet-explorer-8/fr-ca/ie8.aspx");
  }
  
}

function trackit(url) 
{ 
window.open(url,'mywindow','width=1024,height=900,toolbar=yes,location=yes,directories=yes,status=yes,menubar=yes,scrollbars=yes,copyhistory=yes,resizable=yes');
}