勤于思考：IE10不支持檢測IE6的代碼

這句話

var isIE6 = isIE && ([/MSIE (\d)\.0/i.exec(navigator.userAgent)][0][1] == 6);

在IE6~9都沒問題，就IE10下報錯

改爲

var isIE6 = isIE && ([/MSIE (\d+)\.0/i.exec(navigator.userAgent)][0][1] == 6);