input.sBox{
width: 110px;
border: 1px solid #DDD;
padding: 1px 6px;
height: 20px;
}

input.submit{
background: url(http://www.hokudai.ac.jp/common/img/h_search.png) no-repeat;
text-indent: -9999px;
border: none;
width: 23px;
height: 24px;
}