//Preload les images pour le rollover //
bouton1 = new Image();
bouton1.src = 'images/i_production_on.gif';
bouton2 = new Image();
bouton2.src = 'images/i_transport_on.gif';
bouton3 = new Image();
bouton3.src = 'images/i_distribution_on.gif';
bouton4 = new Image();
bouton4.src = 'images/i_energie_on.gif';

function affiche(id) {
	id.show();
	effaceAutre(id);
}

function effaceAutre(id) {
	if (id == production) {
		transport.hide();
		distribution.hide();
		energie.hide();
		
		document['i_production'].src = "images/i_production_on.gif";
		document['i_transport'].src = "images/i_transport_off.gif";
		document['i_distribution'].src = "images/i_distribution_off.gif";
		document['i_energie'].src = "images/i_energie_off.gif";
		
		}
	if (id == transport) {
		production.hide();
		distribution.hide();
		energie.hide();
		
		document['i_production'].src = "images/i_production_off.gif";
		document['i_transport'].src = "images/i_transport_on.gif";
		document['i_distribution'].src = "images/i_distribution_off.gif";
		document['i_energie'].src = "images/i_energie_off.gif";
		
		}
	
		if (id == distribution) {
		production.hide();
		transport.hide();
		energie.hide();
		
		document['i_production'].src = "images/i_production_off.gif";
		document['i_transport'].src = "images/i_transport_off.gif";
		document['i_distribution'].src = "images/i_distribution_on.gif";
		document['i_energie'].src = "images/i_energie_off.gif";
		
		}
	
	if (id == energie) {
		production.hide();
		transport.hide();
		distribution.hide();
		
		document['i_production'].src = "images/i_production_off.gif";
		document['i_transport'].src = "images/i_transport_off.gif";
		document['i_distribution'].src = "images/i_distribution_off.gif";
		document['i_energie'].src = "images/i_energie_on.gif";
		
		}
		
	}

function efface(id) {
	id.hide();
}

function Swpimg(id)
 {
 state = (document[id].src.indexOf("_on") == -1) ? "_on" : "_off" ;
 document[id].src ="images/" + id + state + ".gif"
 
 }
 function Swpimg2(id)
 {
 state = (document[id].src.indexOf("_on") == -1) ? "_on" : "_off" ;
 document[id].src ="images/" + id + state + ".gif"
 
 }