<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>event对象的冒泡</title>
</head>
<style>
#pm2 {
width:250px;
height:50px;
border:2px dashed #CCC;
padding:10px;
text-align:center;
line-height:40px;
margin:0 auto;
}
#box2 {
width:250px;
height:70px;
background:#000;
text-align:center;
margin:0 auto;
padding:10px;
padding-top:30px;
}
</style>
<body>
<p id="pm2"></p>
<div id="box2">
<button id="btn2">点击</button>
</div>
<script>
function stopPropagation(e){
e = window.event || e;
if(document.all){ //document.all只支持IE属性 通过判断浏览器种类
e.cancelBubble = true;
}
else{
e.stopPropagation();
}
}
var _pm2 = document.getElementById("pm2");
var _box2 = document.getElementById("box2");
var _btn2 = document.getElementById("btn2");
_box2.onclick = function (){
_pm2.innerHTML = "你点击的是:DIV";
alert(1);
}
_btn2.onclick = function (e){
_pm2.innerHTML = "你点击的是：BUTTON";
alert(2);
stopPropagation(e)
}
</script>
</body>
</html>