chess.js

var aside= document.getElementById("mainAside");
var obj= document.getElementById("cntnt");
var obje= document.getElementById("cntn");
var objec= document.getElementById("cnt");
var object= document.getElementById("cn");
var objects= document.getElementById("c");
var bjects= document.getElementById("b1");
var asideOn = false

document.getElementById("btton").addEventListener("click",function(){
	if(asideOn){
		aside.style.left="-200px";
		asideOn=false;
	}else{
		aside.style.left="0px";
		asideOn=true;
	}
	obj.classList.toggle("mar");
	obje.classList.toggle("mar");
	objec.classList.toggle("mar");
	object.classList.toggle("mar");
	objects.classList.toggle("mar");
	bjects.classList.toggle("mar");
});