document.getElementById( " btn " ).onclick = method2;
document.getElementById( " btn " ).onclick = method3;
<div id="div2">2222
<div id="div3"> 3333
<div id="div4" style="border:1px solid red;width:200px;height:200px">
Hello World444
</div>
</div>
</div>
</div>
var d1 = document.getElementById('div1');
var d2 = document.getElementById('div2');
var d3 = document.getElementById('div3');
var d4 = document.getElementById('div4');
d1.addEventListener("click",function(e){
console.log("d1 clicked");
//console.dir(e);
//e.stopPropagation();
},true);
d2.addEventListener("click",function(e){
console.log("d2 clicked");
//e.stopPropagation();
},false);
d3.addEventListener("click",function(e){
console.log("d3 clicked");
//e.stopPropagation();
},false);
d4.addEventListener("click",function(e){
console.log("d4 clicked");
},true);
</script>