[erledigt] Design CSS: Einen eigenen Button einfügen

#nav_container {
float: right;
color: #333;
margin: 0px 0px 0px 0px;
padding: 10px;
position: absolute;
top: 380px;
left 50%;
margin-left: -230px;
z-index: 2;
height: 450px;
width: 180px;
display: inline;
background: #xxx;}
background-image: url(Hier deine Button URL);

li.nav_element a{
color:#FFFFFF;
display: block;
margin: 2px;
padding-left: 10px;
text-decoration: none;
width: 160px;
height: 25px;
background-color:#23c7fd;}

li.nav_element a:hover{
color:#FFFFFF;
display: block;
margin: 3px;
padding-left: 10px;
text-decoration: none;
width: 160px;
height: 25px;
background-color:#19b3e6;}

li.nav_element a{
color:#FFFFFF;
display: block;
margin: 2px;
padding-left: 10px;
text-decoration: none;
width: 160px;
height: 25px;
background-image: url(Bild URL vom Button);}

li.nav_element a:hover{
color:#FFFFFF;
display: block;
margin: 3px;
padding-left: 10px;
text-decoration: none;
width: 160px;
height: 25px;
background-image: url(Bild URL vom Hover Button);}