/* Non-essential styles */ 

*.porthole { float:left; position:relative; width:24%; height:150px; 
             overflow:hidden; text-align:center; color:white; background-color:black; 
             border-left:1px solid gray; border-right:2px solid black; 
             border-top:1px solid gray; border-bottom:2px solid black; }

*.porthole img { position:absolute; left:-230px; top:-30px; z-index:-1; }


/* Essential styles */ 
img { display:block; width:auto; height:auto; }