#close a{
width: 50px;
height: 13px;
font-size: 13px;
line-height: 13px;
background: url(../images/common/btn_close.gif) no-repeat;
display: block;
}
#close a span{
display: none;
}
#close a:hover{
background-position: bottom;
}


#close_center a{
width: 70px;
height: 13px;
font-size: 13px;
line-height: 13px;
background: url(../images/common/btn_close_center.gif) no-repeat;
display: block;
}
#close_center a span{
display: none;
}
#close_center a:hover{
background-position: bottom;
}