取得当前IE浏览器的版本
// ---------------------- // A short snippet for detecting versions of IE in JavaScript // without resorting to user-agent sniffing // ---------------------- // If you're not in IE (or IE version is less than 5) then: // ie === undefined // If you're in IE (>=5) then you can determine which version: // ie === 7; // IE7 // Thus, to detect IE: // if (ie) {} // And to detect the version: // ie === 6 // IE6 // ie > 7 // IE8, IE9 ... // ie < 9 // Anything less than IE9 // ---------------------- // UPDATE: Now using Live NodeList idea from @jdalton var ie = (function(){ 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; }());?