function zoom(titr,lege,img){
	
	var t=document.getElementById("titre");
	var l=document.getElementById("legende");
	var d=document.getElementById("zoomimg");
	
	if(d.style.display == "none" || d.style.display == ""){
		image="./downloads/"+img;
		document.imgzoom.src=image;
		t.innerHTML=titr;
		l.innerHTML=lege;
		d.style.display = "block";
	}else{ 
		image="";
		document.imgzoom.src=image;
		d.style.display = "none";
	}
}