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*/
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