function getIEVersion()
{
  var version = -1; 
  if (navigator.appName == 'Microsoft Internet Explorer')
  {
    var useragent = navigator.userAgent;
    var regexp  = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
    if (regexp.exec(useragent) != null)
      version = parseFloat( RegExp.$1 );
  }
  return version;
}
function checkIEVersion()
{
  var ver = getIEVersion();
  var msg = "Thank you for visiting Sportsmans Warehouse. Your older browser version of Internet Explorer is not compatible with our website.  You will not be able to view many of our product images and site functionality will be limited.  We apologize for this inconvenience.\n\nYou can upgrade your browser at no cost at http://windows.microsoft.com/en-US/windows/downloads?T1=downloadsIE\n\nYou can also download the Firefox browser for free at http://www.mozilla.com/en-US/firefox/ie.html";

  if ( ver > -1 )
  {
    if ( ver <= 6.0 ) 
      alert(msg); 
  }
  
}