#maincontainer {position: absolute; top: 105px; left: 0; right: 0; bottom: 0;  }
 
 #framecontentLeft, #framecontentRight
{
height: 100%;
overflow: visible;
color:black; font:7.5pt verdana; line-height:13px; border:1px solid black;
}
 
 #framecontentLeft 
{ 
position: absolute; 
top: 0px; 
left: 0; 
width:230px; 
background-color:#efefac;
}
 
 #framecontentRight
{ 
position: absolute; 
left: auto; 
right: 0; 
width: 250px; 
background-color:#ffff99;
}
 
 #maincontent{ 
position:absolute; 
top:0; 
left:230px; 
right:250px; 
bottom:0;  
background:#dddfff; font:8pt verdana; line-height:150%;  border-right:1px dashed Silver; border-left:1px dashed Silver}
 
 .innertube{margin: 15px; /*Margins for inner DIV inside each DIV (to provide padding)*/}