if(document.cookie.substring ( 0,1)==1)
{
	document.getElementById("intro").style.display='none';
	document.getElementById("main").style.display='block';
	document.getElementById("piedPage").style.display='block';
}
else
{
	document.cookie=dejavenu=1;
	document.getElementById("intro").style.display='block';
	document.getElementById("main").style.display='none';	
	document.getElementById("piedPage").style.display='none';	
}

/*exemple
document.body.style.backgroundImage='url(blues.jpg)';
document.body.style.backgroundRepeat='repeat';
document.body.style.backgroundAttachment='';
document.body.style.backgroundPosition='';
document.body.style.color='#FFFF00';
document.linkColor = '#00ff00';
document.alinkColor = '#00ff00';
document.vlinkColor = '#00ff00';
*/