function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

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; }
}


var vis = new Array();
var years = new Array();

function swap_couche(couche){
	for (var i = 0;i<years.length;i++){
		var year=years[i];

		vis[year]='hide';
		MM_swapImage('alinea'+year,'','img_pack/alinea.gif',1)
		MM_showHideLayers('Layer'+year,'','hide');
		MM_showHideLayers('yearPlus'+year,'','show');
		MM_showHideLayers('yearMoins'+couche,'','hide');
	}

	MM_showHideLayers('yearPlus'+couche,'','hide');
	MM_showHideLayers('yearMoins'+couche,'','show');
	MM_showHideLayers('Layer'+couche,'','show');
	MM_swapImage('alinea'+couche,'','alineabas.gif',1)
}

function swap_couche_plus(couche){
	for (var i = 0;i<years.length;i++){
		var year=years[i];
		vis[year]='hide';
		MM_swapImage('alinea'+year,'','img_pack/alinea.gif',1);
		MM_showHideLayers('Layer'+year,'','hide');
		MM_showHideLayers('yearPlus'+year,'','show');
		MM_showHideLayers('yearMoins'+year,'','hide');
	}
	MM_showHideLayers('yearMoins'+couche,'','show');
	MM_showHideLayers('yearPlus'+couche,'','hide');
	MM_showHideLayers('Layer'+couche,'','show');
	MM_swapImage('alinea'+couche,'','alineabas.gif',1);
}

function swap_couche_moins(couche){
	MM_swapImage('alinea'+couche,'','img_pack/alinea.gif',1);
	MM_showHideLayers('Layer'+couche,'','hide');
	MM_showHideLayers('yearMoins'+couche,'','hide');
	MM_showHideLayers('yearPlus'+couche,'','show');
}