#search_box {

float:center;
width: 100%; 
height: 34px; 

} 
#search_box #s { 
float: left; 
padding: 0px; 
width: 50%;
height:34px;
background: #eee; 
font-size: .8em; 
} 
#search_box #go { 
float: left; 
margin: 0 2px 0 0; 
}