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_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_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_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 Box(nb_Carton,type_Apart,type_Vu,taille) {
      this.nbCarton = nb_Carton ;
      this.typeApart = type_Apart ;
      this.typeVu = type_Vu ;
	  this.Taille = taille ;
   }
//Création des objets
var Boxa = new Box ("15 &agrave; 30 cartons","1 chambre","2/3 m&sup3;","<2m") ;
var Boxb = new Box ("30 cartons","1 chambre","4/5 m&sup3;","2m") ;
var Boxc = new Box ("45 cartons","Studio 15 &agrave; 20 m&sup2;","7 m3","3m") ;
var Boxd = new Box ("60 cartons","Studio 20 &agrave; 30 m&sup2;","10 m3","4m") ;
var Boxe = new Box ("80 cartons","F2","12 m&sup3;","5m") ;
var Boxf = new Box ("120 cartons","F3","20 m&sup3;","8m") ;
var Boxg = new Box ("150 cartons","F4","36 m&sup3;","9 \340 12m") ;
var Boxh = new Box ("180 cartons","F5","45 m&sup3;","12 \340 15m") ;


var tbox = new 	Array ;
tbox[0]= Boxa ;
tbox[1]= Boxb ;
tbox[2]= Boxc ;
tbox[3]= Boxd ;
tbox[4]= Boxe ;
tbox[5]= Boxf ;
tbox[6]= Boxg ;
tbox[7]= Boxh ;



//indice pour suivre...
var indCarton  = 0 ;
var indChambre  = 0 ;
var nbrsurface  = 0;

function modifierCarton(sens) {	//+1 ou -1
	  if(  sens > 0 ){
	  		if( (indCarton + sens)  < tbox.length)
			{
				indCarton++ ; 
				document.getElementById("nbCartonPart").innerHTML = tbox[indCarton].nbCarton ;
	 			document.getElementById("correspondaneCarton").innerHTML = tbox[indCarton].Taille ;
				document.getElementById("surfacetotal").value = tbox[indCarton].Taille ;
			}
	  }
	  else
	  {
	  	if(	indCarton + sens >= 0)
		{
			indCarton-- ; 
			document.getElementById("nbCartonPart").innerHTML = tbox[indCarton].nbCarton ;
 			document.getElementById("correspondaneCarton").innerHTML = tbox[indCarton].Taille ;
			document.getElementById("surfacetotal").value = tbox[indCarton].Taille ;
			document.getElementById("txtsurface").innerHTML = '';		
		}
	  }	  
}

function modifierChambre(sens) {	//+1 ou -1
	  if(  sens > 0 ){
	  		if( (indChambre + sens)  < tbox.length)
			{				
				indChambre++ ; 
	 			document.getElementById("nbChambrePart").innerHTML = tbox[indChambre].typeApart ;
				document.getElementById("correspondanceChambre").innerHTML = tbox[indChambre].Taille ;
				document.getElementById("surfacetotal").value = tbox[indChambre].Taille ;
			}
	  }
	  else
	  {
	  	if(	indChambre + sens >= 0)
		{
			indChambre-- ; 
			document.getElementById("nbChambrePart").innerHTML = tbox[indChambre].typeApart ;
			document.getElementById("correspondanceChambre").innerHTML = tbox[indChambre].Taille ;
			document.getElementById("surfacetotal").value = tbox[indChambre].Taille ;
		}
	  }
}