.top_w {
background:url("../img/top_new.png") no-repeat scroll 100% 0 transparent;
float:left;
height:200px;
position:relative;
width:990px;
margin: 0;
}

.logo_w {
background:url("../img/logo_new.png") no-repeat scroll 0 0 transparent;
height:138px;
overflow:hidden;
position:absolute;
text-indent:-9999px;
top:15px;
width:375px;
}

.logo_w:hover{
background:url("../img/logo_new.png") no-repeat scroll 0 0 transparent;
}