function affichDiv(id){
	cacheDiv(id);
	if(document.getElementById(id).style.display='none'){
		document.getElementById(id).style.display='block';
		
	}else{
		document.getElementById(id).style.display='none';
	}
}

function cacheDiv(id){
	if(document.getElementById('menu_introduction') && document.getElementById('menu_introduction').style.display!='none' && id!='menu_introduction'){
		document.getElementById('menu_introduction').style.display='none';
	}
	if(document.getElementById('menu_partners') && document.getElementById('menu_partners').style.display!='none' && id!='menu_partners'){
		document.getElementById('menu_partners').style.display='none';
	}
	
	if(document.getElementById('menu_thedesk') && document.getElementById('menu_thedesk').style.display!='none' && id!='menu_thedesk'){
		document.getElementById('menu_thedesk').style.display='none';
	}
	if(document.getElementById('menu_library') && document.getElementById('menu_library').style.display!='none' && id!='menu_library'){
		document.getElementById('menu_library').style.display='none';
	}
}

function cacheMenu() {
	document.getElementById('library').src='/charte/menu/btn-library.gif';
	document.getElementById('partners').src='/charte/menu/btn-partners.gif';
	document.getElementById('thedesk').src='/charte/menu/btn-thedesk.gif';
	document.getElementById('introduction').src='/charte/menu/btn-introduction.gif'	;
}