.button {
    border: none;
    background: url(../img_common/button-blu-up.png) no-repeat top left;
		width:94px; height:25px;
		text-align:center; line-height:25px;
}
.button:hover {
    border: none;
    background: url(../img_common/button-blu-down.png) no-repeat top left;
    width:94px; height:25px;
		text-align:center; line-height:25px;
}