if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)){ //test for MSIE x.x;
 var ieversion=new Number(RegExp.$1) // capture x.x portion and store as a number
 if (ieversion=9)
  //document.alert("You're using IE9 or above")
    window.location="index-ie";
  
 else if (ieversion=8)
  //alert("It has been detected that you are using Internet Explorer 8. Unfortunately this is an unsupported browser and you won't be able to view this website properly. We recommend upgrading to a newer version of Internet Explorer, FireFox or Chrome."),
  window.location="index-ie";
 else if (ieversion=7)
  //alert("It has been detected that you are using Internet Explorer 7. Unfortunately this is an unsupported browser and you won't be able to view this website properly. We recommend upgrading to a newer version of Internet Explorer, FireFox or Chrome."),
  window.location="index-ie";
 else if (ieversion=6)
  //alert("It has been detected that you are using Internet Explorer 6. Unfortunately this is an unsupported browser and you won't be able to view this website properly. We recommend upgrading to a newer version of Internet Explorer, FireFox or Chrome."),
  window.location="index-ie";
 else if (ieversion=5)
 // alert("It has been detected that you are using Internet Explorer 5. Unfortunately this is an unsupported browser and you won't be able to view this website properly. We recommend upgrading to a newer version of Internet Explorer, FireFox or Chrome."),
  window.location="index-ie";
}
else
 document.alert("Welcome")