var browser = navigator.appName;//判断浏览器是否为IE,Microsoft Internet Explorer
    var b_version = navigator.appVersion;
    var version = b_version.split(";");
    var trim_Version = version[1].replace(/[ ]/g, "");//判断IE版本,MSIE6.0MSIE7.0MSIE8.0MSIE9.0

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