用javascript判断IE版本号

用javascript判断IE版本号:

var _IE = (function(){
    var 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 : false ;
}());

 

原文地址：http://julying.com/blog/determine-the-version-number-of-ie-with-javascript/