Mine

#container{
width:100%;
height:100%;
margin:0px;
padding:0px;
}

#sidecontent{
float:left;
width:250px;
height:auto;
border:1px solid #000000;
}

#rightpanel{
float:right;
width:250px;
height:auto;
border:1px solid #000000;
}

#header,#footer{
width:100%;
height:100px;
border:1px solid #000000;
clear:both;
}

#content{
overflow:auto;
height:auto;
border:1px solid #000000;
}