!function(){
    var v = 3,
        div = document.createElement('div'),
        all = div.getElementsByTagName('i');
    while (
        div.innerHTML = '<!--[if gt IE ' + (++v) + ']><i></i><![endif]-->',
        all[0]
    );
    document.documentElement.className += v > 4 ? " ie" + v : ""; // modernized: thx to john-naked dalton :)
}();