.serfan_captcha_bg{
    width:300px;
    height:260px;
    background: url(./bg.jpg) no-repeat center;
}
.serfan_captcha_td{
    border:0;
    width:100px;
}
.serfan_captcha_img{
    width: 50px;
    height:50px;
    cursor: pointer;
    margin-left:20px;
    margin-top:150px;
}
.serfan_img_star{
    background: url(./star.png) no-repeat center;
}
.serfan_img_cube{
    background: url(./cube.png) no-repeat center;
}
.serfan_img_triangle{
    background: url(./triangle.png) no-repeat center;
}