a {
    -webkit-filter: blur(10px);
            filter: blur(10px);
    -webkit-transition: -webkit-filter 2s;
    transition: -webkit-filter 2s;
    transition: filter 2s;
    transition: filter 2s, -webkit-filter 2s;
}

div {
    filter: progid:DXImageTransform.Microsoft.Alpha(opacity=50);
}

b {
    filter: alpha(opacity=100);
}

em {
    filter: Alpha(opacity=100);
}
