<style>


body{
margin:0;  
background: white;  
font-size: 1em; 
}  

div#header, div#sidebar{  
position:absolute;  
right:0;  
overflow:hidden; 

}  

#header{  
top:0;  
z-index:10;  
width:900px;  
height:60px;   
background:white; 
overflow:hidden; 
	left: 50%;
    margin-left: -450px;
} 

#content{  
top:60px;
width:800px;  
z-index:10;  

left: 50%;
margin-left: -655px;
height:auto; 
position:absolute;  
 
 
} 

#sidebar{
top:60px; 
bottom:0; 
width:250px;
margin:0; 
padding:0; 
left: 50%;
margin-left: 240px;
color:#000; 

z-index:200; 
}  


@media screen{  
body>#header, body> #sidebar
{
position:fixed!important;
}

}  

<!--[if IE]>
<link href="stileie1.css" rel="stylesheet" type="text/css"  media="screen">
<![endif]-->

</style>