<style type="text/css">
body
{
margin: 0px;
padding: 0px;
}
#header
{
left: 0px;
top: 0px;
width: 990px;
height: 100px;
margin: 0px;
padding: 0px;
border-style: solid;
background-color: #ffffff;


}
#content
{
position:absolute;
left: 112px;  /* menu width + some separation */
top: 10px;
width: 880px; /* header width - menu width */
height: 880px;
border-style: solid;
border-width: 1px;
background-color: #ffffff;


}
#menu
{
position:relative;
width: 100px;
height: 100px;
border-style: solid;
border-width: 0px;
background-color: #ffffff;
}
</style>