#menu_contenidor {
background:none;
width:800px;
height: 100px;
left:50%;
margin-left:-405px;

}
#kwicks {
position: relative;
 width:800px;
 left:50%;
margin-left:-405px;
background:none;
}
 
#kwicks .kwick {
 float: left;
 left:0px;
 display: block;
 width: 190px;
 height: 100px;
border-right: 2px solid #3A4244;
border-top: 2px solid #3A4244;
border-bottom: 2px solid #3A4244;
}

 #kwicks li {
float: left;
list-style-type:none;
 list-style:none;
 margin:0px;
}

#kwicks .kwick span {
display: none;
}

#kwicks .opt1 {
background-image:url('opt1.png');
background-repeat:no-repeat;
border-left: 2px solid #3A4244;
}
#kwicks .opt2 {
background-image:url('opt2.png');
background-repeat:no-repeat;
}
#kwicks .opt3 {
background-image:url('opt3.png');
background-repeat:no-repeat;
}
#kwicks .opt4 {
background-image:url('opt4.png');
background-repeat:no-repeat;
}