<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style type="text/css">
*{ margin:0; padding:0;}
</style>
</head>
<body>
<div id="obj1" style=" width:500px; height:500px; background:#000;">
<div id="obj2" style="width:400px; height:400px; background:red;"></div>
</div>
<script type="text/javascript">
var obj1 = document.getElementById('obj1');
var obj2 = document.getElementById('obj2');
obj1.onclick = function(){
alert('我点击了obj1');
}
obj2.onclick = function(e){
alert('我点击了obj2');
}
</script>
</body>
</html>
在通常情况下，我们只希望事件发生在它的目标而并非它的父级元素上，只需加个stopBubble方法，即可取消事件冒泡，详见以下代码：
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style type="text/css">
*{ margin:0; padding:0;}
</style>
</head>
<body>
<div id="obj1" style=" width:500px; height:500px; background:#000;">
<div id="obj2" style="width:400px; height:400px; background:red;"></div>
</div>
<script type="text/javascript">
//阻止事件冒泡的通用函数
function stopBubble(e){
// 如果传入了事件对象，那么就是非ie浏览器
if(e&&e.stopPropagation){
//因此它支持W3C的stopPropagation()方法
e.stopPropagation();
}else{
//否则我们使用ie的方法来取消事件冒泡
window.event.cancelBubble = true;
}
} var obj1 = document.getElementById('obj1');
var obj2 = document.getElementById('obj2');
obj1.onclick = function(){
alert('我点击了obj1');
}
obj2.onclick = function(e){
alert('我点击了obj2');
stopBubble(e);
}
</script>
</body>
</html>
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