var ie = (function() {
    if (!','.split(/,/).length) { return false };
    var undef,
        v = 3,
        div = document.createElement('div'),
        all = div.getElementsByTagName('i');
    while (
        div.innerHTML = '<!--[if gt IE ' + (++v) + ']><i></i><![endif]-->',
        all[0]
    );
    return v > 4 ? v : undef;
} ());
function setActiveStyleSheet() {

    document.getElementsByTagName("link")[0].href = "/CSS/baseIE9.css";
    document.getElementsByTagName("link")[1].href = "/CSS/masterIE9.css";
}
if (ie == "9") {
    setActiveStyleSheet();
}