Code umändern damit richtig anzeigt wird

<div id="design_blue">

<div id="footer">
</div>

body {
background-image: url();
background-color: #888;
font-family: sans-serif;
font-size: 0.8em;
text-align: center;
}

a {
color: #000;
}

#design_blue {
width: 950px;
margin: 0 auto;
text-align: left;
background-color: #1c6bd5;
border: 2px solid #000;
}

#unten {
clear: both;
}

#header_container {
height: 180px;
background-color: #1c6bd5;
border-bottom: 2px solid #000;
}

#header {
margin: 0px;
padding-left: 400px;
padding-top: 50px;
color: #000;
font-family: serif;
}

#nav_container {
float: left;
width: 200px;
}

#nav {
padding: 0;
margin: 0;
}

#nav li {
list-style-type: none;
padding: 6px;
padding-left: 30px;
font-size: 1.4em;
display: block;
border-bottom: 2px solid #000;
border-left: 2px solid #000;
}

#nav a {
text-decoration: none;
}

#nav a:hover {
color: #000;
}

#content_container {
float: left;
width: 746px;
border-left: 2px solid #000;
border-right: 2px solid #000;
}

#content {
padding: 15px;
}

#footer{
    width: 950px;
    height: 140px;
    background: url(http://img.webme.com/pic/p/pexxi-arts/unbekannt2.png) no-repeat;
    color: #000;
    margin-top: 0px;
    padding-top: 0px;
    text-align: right;
    float: left;
    border: 2px solid #000;
    clear: both;
    }

#footer a {
    color: #fff;
    text-decoration: underline;
    }

#footer a:hover{
    color: #dc0000;
    text-decoration: underline;
    }

#nav_heading { display: none; }

#content_container {
float: left;
width: 746px;
border-left: 2px solid #000;
border-right: 2px solid #000
background: #1c6bd5;
}