function switchDIV(id){
	var obj = document.getElementById(id)
	if (obj) if (obj.style.display == "none"){
		obj.style.display = "block";
		
	}
	else{
	 obj.style.display = "none"
	 
	}
}

function openDIV(id){
	var obj = document.getElementById(id);
	obj.style.display = "block";
	
}

function closeDIV(id){
	var obj = document.getElementById(id);
	obj.style.display = "none";
	
}

function afficheStudio(){
	var superficie = document.simulation.elements['superficie'].options[document.simulation.elements['superficie'].selectedIndex].value 

	if(document.simulation.bien[0].checked){		
		closeDIV('div_enfants'); 
		closeDIV('div_niveau');
		closeDIV('div_cuisines');
		closeDIV('div_chambres');
		closeDIV('div_pieces');
	}
	else{
		openDIV('div_enfants'); 
		openDIV('div_niveau');
		openDIV('div_cuisines');
		openDIV('div_chambres');
		openDIV('div_pieces');
	}
	if(superficie >=50) openDIV('div_enfants'); 
	afficheGarage();
	afficheCheminee();
}

function afficheGarage(){
	if(document.simulation.bien[2].checked && !document.simulation.bien[0].checked){
		openDIV('div_garage');
	}
	else{
		closeDIV('div_garage');
	}
}

function afficheCheminee(){
	var nbrpieces = document.simulation.elements['pieces'].options[document.simulation.elements['pieces'].selectedIndex].value 
	if (nbrpieces != 0 && !document.simulation.bien[0].checked){
		openDIV("div_cheminees")
	}
	else{
	 	closeDIV("div_cheminees")
	}
}

function alertCheminee(){
	var nbrcheminee = document.simulation.elements['cheminees'].options[document.simulation.elements['cheminees'].selectedIndex].value 
	var nbrpieces = document.simulation.elements['pieces'].options[document.simulation.elements['pieces'].selectedIndex].value 

	if (nbrcheminee > nbrpieces){
		alert('attention le nombre de cheminéées ne peut être supérieur aux nombres de pièces !');
	simulation.cheminees.options.selectedIndex=nbrpieces;
	}
}