.centerDiv{
    width:600px;
    height:200px;
    margin:50px auto;
}
.logoDiv{
    text-align:center;
}
.centerDiv{
    height:50px;
    text-align:center;
}
#d_resp{
    height:50px;
    text-align:center;
}
#b_test1{
    height:30px;
    text-align: center
}
#file{
    width:300px;
    height:22px;
    margin:10px auto;
    border:1px dashed black
}