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Welcome to the IETester Homepage.

IETester allows you to have the rendering and javascript engines of IE 6 and IE5.5 on Vista, as well as the installed IE in the same process.

This is an alpha release, so feel free to post comments/bugs on the IETester forum or contact me directly.


Basic Info about browser loading this page

Info Value

HTTP header User Agent string

CCBot/2.0 (

navigator userAgent

Javascript IE version

(see below for JS code used)

Conditional comments

XHR request

Javascript code used to detect version:

    var v = 'Unknown version : (contact me, I am interested by your config ... ;-)';
    var ok = 1;

    if (document.documentMode == 11)
         v = 'IE 11';
    else if (document.documentMode == 10)
         v = 'IE 10';
    else if (document.documentMode == 9)
         v = 'IE 9';
    else if (window.postMessage)
         v = 'IE 8';
    else if (window.XMLHttpRequest)
         v = 'IE 7';
    else if (document.compatMode)
         v = 'IE 6';
    else if (window.createPopup)
         v = 'IE 5.5';
    else if (window.attachEvent)
         v = 'IE 5';
    else if (document.all)
        document.write('IE 4');
        ok = 0;

    if (ok == 1)
        document.getElementById('ieversion').innerHTML = v;