css代码：
.header{
width: 1226px;
height: 100px;
margin: 0px auto;
line-height: 90px;
padding-left: 40px;
}
.content{
width: 100%;
height: 580px;
background: url(../img/login.png);
}
html代码：
<div class="content">
<div class="login_content">
<div class="login_form">
</div>
</div>
</div>
