.captchaImg, .captchaTxt {
    width: 100%;
    margin: 10px 0 10px 0;
       text-align: right;
}

    .captchaImg img, .captchaTxt input[type=text] {
        width: 154px;
    }

body[dir=rtl] .captchaImg, body[dir=rtl] .captchaTxt {
    text-align: left;
}
.captchaRefreBtn{
    vertical-align:middle;
    width:20px;
    height:20px;
}