起泡和捕获阶段的行为

有人能根据代码中4个案例的输出，点击div2和div1 ，解释一下这个代码的冒泡和捕获阶段吗

http://jsfiddle.net/JuKmM/9/

代码：

function doSomething2(){
 console.log("div 1 clicked");
}
var element1=document.getElementById('div_1');
var element2=document.getElementById('div_2');
element1.addEventListener('click',doSomething2,false);
element2.addEventListener('click',doSomething,true);
//element1.addEventListener('click',doSomething2,false);
//element2.addEventListener('click',doSomething,false);
//element1.addEventListener('click',doSomething2,true);
//element2.addEventListener('click',doSomething,true);
//element1.addEventListener('click',doSomething2,true);
//element2.addEventListener('click',doSomething,false);
function doSomething(){
console.log("div2 clicked");
}