对于javascript的冒泡，我一直误解它了，
冒泡，即是从底层往外blow blow blow ...
惭愧的是，我一直以为阻止冒泡是阻止父元素往子元素传递事件……
贴上一串代码以便往后回顾！
<script type="text/javascript">
window.onload=function(){
var a=document.getElementById("a");
var b=document.getElementById("b");
var c=document.getElementById("c");
var c=document.getElementById("d");
a.onclick=function(e){
this.style.background="#000";
};
b.onclick=function(e){
this.style.background="#ccc";
//阻止事件冒泡
window.event.cancelBubble = true;//IE8以下
e.stopPropagation();
};
d.onmousedown=function(e){
//阻止默认事件，比如在chrome下图片有拖拽默认行为
window.event.returnValue = false;
e.preventDefault();
}
}
</script>
Html部分
<div id="a" style="width:300px;height:300px;background:red;overflow:hidden;">
<div id="b" style="width:200px;height:200px;background:green;margin:50px 0 0 50px;overflow:hidden;">
<div id="c" style="width:100px;height:100px;background:yellow;margin:50px 0 0 50px;overflow:hidden;">
<img src="240x240.jpg" width="50" height="50" id="d" />
</div>
</div>
</div>
另一个例子：
<script type="text/javascript">
window.onload=function(){
document.getElementById("test").addEventListener('click',function(e){
alert('aaaa')
},false);
document.getElementById("test1").addEventListener('click',function(e){
alert('bbb')
e.stopPropagation();
},false)
}
</script>
<style type="text/css">
#test1{width:100px;height:100px;background:#ff0}
#test2{width:100px;height:100px;background:#ff0}
</style>
<div id="test" style="width:100px;height:100px;background:#f60;padding:20px;">
<div id="test1"></div>
</div>
