msieversion

msieversion.js

function msieversion() {

        var ua = window.navigator.userAgent;
        var msie = ua.indexOf("MSIE ");

        if (msie > 0 || !!navigator.userAgent.match(/Trident.*rv\:11\./))      // If Internet Explorer, return version number
            alert(parseInt(ua.substring(msie + 5, ua.indexOf(".", msie))));
        else                 // If another browser, return 0
            alert('otherbrowser');

   return false;
}