.login_button{
	font-size:12px;
	color:#FFFFFF;
	background-attachment: fixed;
	background-image: url(../images/denglu.gif);
	background-repeat: repeat;
	background-position: left top;
	border:0;
}
.login_button a {
background:url(../images/denglu.gif);
}
.login_button a:hover{
background:url(../images/bg1.gif);
}