body{
    /*background:url('back.jpg');*/
}
.maintale{
    width: 600px;
    height: 500px;
    background-color: #ffffff;
}
.writediv{
    margin: 0 auto;
    width: 400px;
    height: 100px;
    border: 1px solid #5e7c85;
}
.tablediv{
    margin: 0 auto;
    width: 600px;
    height: 500px;
    border: 1px solid #5e7c85;
}
.firstString,.lastString{
   width: 296px;
}
.btn{
	margin: 10px 170px;
}
.explain{
    position: absolute;
    width: 295px;
    top: 107px;
    left: 46px;
}
.colorex{
    height: 20px; 
    width: 41px;
    margin-top: 24px;
}