function show_intro(div1, div2, div3, div4, div5) {
	document.getElementById(div1).style.display='block';
	document.getElementById(div2).style.display='none';
	document.getElementById(div3).style.display='none';
	document.getElementById(div4).style.display='block';
	document.getElementById(div5).style.display='none';
	document.getElementById('contenu_news_info').style.display='block';
	document.getElementById('contenu_intro').style.display='block';
		/*document.getElementById('contenu_gest_lumiere').style.display='none';
		document.getElementById('contenu_iso_dynamique').style.display='none';
		document.getElementById('contenu_ventil_naturelle').style.display='none';*/


}
function show_detail(div1, div2, div3, div4, div5) {
	document.getElementById(div1).style.display='none';
	document.getElementById(div2).style.display='block';
	document.getElementById(div3).style.display='block';
	document.getElementById(div4).style.display='none';
	document.getElementById(div5).style.display='none';
	document.getElementById('contenu_news_info').style.display='block';
	document.getElementById('detail').style.display='block';
	document.getElementById('contenu_esp2').style.display='none';
	document.getElementById('contenu_ref').style.display='none';
	document.getElementById('espace3').style.display='none';
}
function start() {
	show_intro("contenu_esp2", "detail", "espace_annonce", "contenu_ref");
}