function calcul_nbnuitee(aaaammjj_arr,aaaammjj_dep)
	{
	var nbnuitee=0;
	
	aaaa_arr=parseFloat(aaaammjj_arr.substr(6,4));
	jj_arr=parseFloat(aaaammjj_arr.substr(0,2));
	mm_arr=parseFloat(aaaammjj_arr.substr(3,2));
	
	aaaa_dep=parseFloat(aaaammjj_dep.substr(6,4));
	jj_dep=parseFloat(aaaammjj_dep.substr(0,2));
	mm_dep=parseFloat(aaaammjj_dep.substr(3,2));
	
	aaaa=aaaa_arr;
	jj=jj_arr;
	mm=mm_arr;
	//alert("j : "+jj+" m : "+mm+" annee : "+aaaa+"");
	bi=28;
	if((aaaa%4) == 0) 
		bi=29;
	mois=new Array("",31,bi,31,30,31,30,31,31,30,31,30,31);

	aaaammjj=aaaammjj_arr;
	
	while( (aaaammjj_dep!=aaaammjj))
		{
		jj++;
		if(jj>mois[mm])
			{
			jj=1;
			mm++;
			if(mm==13)
				{
				mm=1;
				aaaa++;
				bi=28;
				if((aaaa%4) == 0) 
					bi=29;
				}
			}
		aaaa_now=aaaa;
		jj_now=jj;
		mm_now=mm;
		if (jj<10) 	 jj_now="0"+jj;
		if (mm<10)	 mm_now="0"+mm;
		aaaammjj=jj_now+"/"+mm_now+"/"+aaaa_now;
		//alert(aaaammjj);
		nbnuitee++;
		}
	return (nbnuitee);
	}