js判断IE浏览器及版本

function isIE(_version){_version = _version || '';var b = document.createElement('b');b.innerHTML = '<!--[if IE ' + _version + ']>1<![endif]-->';return b.innerHTML === '1';}

console.log(isIE(6));/*判断是否是IE6*/

console.log(isIE());/*判断是否是IE浏览器*/