body {
   margin: 0px;
   padding: 0px;
   background: #FFFF00;
   border: 0px;
   width: 100%;
   min-width: 400px;
   max-width: 100%;
   height: 100%;
   max-height: 100%;
   overflow:hidden;
   }

.box_menu {
   position:absolute; 
   top:0px;  
   left:0px;   
   height:100%; 
   width:206;
   float:left;
   overflow-x:hidden;
   overflow-y:auto;
}
.box_display {
   position:absolute; 
   top:0px; 
   left:209px; 
   height:100%;   
   overflow-x:hidden;
   overflow-y:auto;
}