.tguide { 
width: 510px; 
} 
.tguide ul { 
width: 510px; 
margin: 0px; 
} 
.tguide li { 
float: left; 
width: 255px; 
height: 40px; 
list-style-type: none;
text-align: center; 
line-height: 50px; 
}