// JavaScript Document
	function rollOver(div, img, deroul){
		document.getElementById(div).style.background="url(img/"+img+".png)";
		document.getElementById(div).style.backgroundRepeat='no-repeat';
		document.getElementById(deroul).style.display='';
	}
	
	function rollOut(){
		document.getElementById('bt_acheter').style.background="url(img/acheter1.png)";
		document.getElementById('deroul_acheter').style.display='none';
		
		document.getElementById('bt_louer').style.background="url(img/louer1.png)";
		document.getElementById('deroul_louer').style.display='none';
	}