<!--


var vis = new Array();


function swap_calque(couche){
        if (vis[couche] == 'show'){
                MM_swapImage('puce'+couche,'','images/plus.gif?'+couche,1)
                MM_showHideLayers('Layer'+couche,'','hide');
                vis[couche] = 'hide';
        } else {
                MM_swapImage('puce'+couche,'','images/moins.gif?'+couche,1)
                MM_showHideLayers('Layer'+couche,'','show');
                vis[couche] = 'show';
        }
}

function MM_showHideLayers() { //v3.0
 var i,p,v,obj,args=MM_showHideLayers.arguments;
 for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
   if (obj.style) { obj=obj.style; v=(v=='show')?'block':(v='hide')?'none':v; }
   obj.display=v; }
}
//-->