确实比较难办
我找了个例子<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="zh" xml:lang="zh">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="developer" content="Realazy" />
<title>Bubble in JavaScript DOM--JavaScript 的事件冒泡 demo </title>
<style type="text/css" media="screen">
div * {display:block; margin:4px; padding:4px; border:1px solid white;}
textarea {width:20em; height:2em;}
</style>
<script type="text/javascript">
//<![CDATA[
function init(){
var log = document.getElementsByTagName('textarea')[0];
var all = document.getElementsByTagName('div')[0].getElementsByTagName('*');
for (var i = 0, n = all.length; i < n; ++i){
all[i].onmouseover = function(e){
this.style.border = '1px solid red';
log.value = '鼠标现在进入的是: ' + this.nodeName;
};
all[i].onmouseout = function(e){
this.style.border = '1px solid white';
};
}
var all2 = document.getElementsByTagName('div')[1].getElementsByTagName('*');
for(var i = 0, n = all2.length; i < n; ++i){
all2[i].onmouseover = function(e){
this.style.border = '1px solid red';
if (e) //停止事件冒泡
e.stopPropagation();
else
window.event.cancelBubble = true;
log.value = '鼠标现在进入的是: ' + this.nodeName;
};
all2[i].onmouseout = function(e){
this.style.border = '1px solid white';};
}
}
window.onload = init;
//]]>
</script>
</head>
<body>
<h1>Bubble in JavaScript DOM</h1>
<p>DOM树的结构是:</p>
<pre><code>
UL
- LI
- A
- SPAN
</code></pre>
<div>
<ul>
<li><a href="#"><span>Bubbllllllllllllllle</span></a></li>
<li><a href="#"><span>Bubbllllllllllllllle</span></a></li>
</ul>
</div>
<textarea></textarea>
<p>鼠标进入UL的任何一个子元素,如果不停止冒泡,我们从UL到SPAN都定义了鼠标悬停(<code>mouseover</code>)事件,这个事件会上升了UL,从而从鼠标所进入的元素到UL元素都会有红色的边。</p>
<div>
<ul>
<li><a href="#"><span>Bubbllllllllllllllle</span></a></li>
<li><a href="#"><span>Bubbllllllllllllllle</span></a></li>
</ul>
</div>
<p>如果停止冒泡,事件不会上升,我们就可以获取精确的鼠标进入元素。</p>
</body>
</html>
我找了个例子<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="zh" xml:lang="zh">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="developer" content="Realazy" />
<title>Bubble in JavaScript DOM--JavaScript 的事件冒泡 demo </title>
<style type="text/css" media="screen">
div * {display:block; margin:4px; padding:4px; border:1px solid white;}
textarea {width:20em; height:2em;}
</style>
<script type="text/javascript">
//<![CDATA[
function init(){
var log = document.getElementsByTagName('textarea')[0];
var all = document.getElementsByTagName('div')[0].getElementsByTagName('*');
for (var i = 0, n = all.length; i < n; ++i){
all[i].onmouseover = function(e){
this.style.border = '1px solid red';
log.value = '鼠标现在进入的是: ' + this.nodeName;
};
all[i].onmouseout = function(e){
this.style.border = '1px solid white';
};
}
var all2 = document.getElementsByTagName('div')[1].getElementsByTagName('*');
for(var i = 0, n = all2.length; i < n; ++i){
all2[i].onmouseover = function(e){
this.style.border = '1px solid red';
if (e) //停止事件冒泡
e.stopPropagation();
else
window.event.cancelBubble = true;
log.value = '鼠标现在进入的是: ' + this.nodeName;
};
all2[i].onmouseout = function(e){
this.style.border = '1px solid white';};
}
}
window.onload = init;
//]]>
</script>
</head>
<body>
<h1>Bubble in JavaScript DOM</h1>
<p>DOM树的结构是:</p>
<pre><code>
UL
- LI
- A
- SPAN
</code></pre>
<div>
<ul>
<li><a href="#"><span>Bubbllllllllllllllle</span></a></li>
<li><a href="#"><span>Bubbllllllllllllllle</span></a></li>
</ul>
</div>
<textarea></textarea>
<p>鼠标进入UL的任何一个子元素,如果不停止冒泡,我们从UL到SPAN都定义了鼠标悬停(<code>mouseover</code>)事件,这个事件会上升了UL,从而从鼠标所进入的元素到UL元素都会有红色的边。</p>
<div>
<ul>
<li><a href="#"><span>Bubbllllllllllllllle</span></a></li>
<li><a href="#"><span>Bubbllllllllllllllle</span></a></li>
</ul>
</div>
<p>如果停止冒泡,事件不会上升,我们就可以获取精确的鼠标进入元素。</p>
</body>
</html>
if (e) //停止事件冒泡
e.stopPropagation();//FF ....
else
window.event.cancelBubble = true;//IE
这是它。
<div style='height:auto; width:100%;'>asd1</div>
<div style='height:auto; width:100%;'>asd2</div>
<div style='height:auto; width:100%;'>asd3</div>
<div style='height:auto; width:100%;'>asd4</div>
</div>
<script>
function $(Id){return document.getElementById(Id)}
function addListener(element,e,fn){ element.addEventListener?element.addEventListener(e,fn,false):element.attachEvent("on" + e,fn)};
//addListener($('ss'),'mouseout',gg)
addListener($('ss'),'mouseout',function(event){gg(event,$('ss'))})
function gg(e,my){
e = e || event;
var obj = e.relatedTarget||e.toElement;
if(judge(my,obj)) return;
alert('a');
}
function judge(parent,child){
if(parent == child) return true;
while(child=child.parentNode){if(child==parent)return true;}
return false;
}
</script>
or
<div id='ss' style="width:150px; height:auto; position:absolute;border:1px solid #98CCFF;">
<div style='height:auto; width:100%;'>asd1</div>
<div style='height:auto; width:100%;'>asd2</div>
<div style='height:auto; width:100%;'>asd3</div>
<div style='height:auto; width:100%;'>asd4</div>
</div>
<script>
function $(Id){return document.getElementById(Id)}
function addListener(element,e,fn){ element.addEventListener?element.addEventListener(e,fn,false):element.attachEvent("on" + e,fn)};
//addListener($('ss'),'mouseout',gg)
addListener($('ss'),'mouseout',function(event){gg(event,$('ss'))})
function gg(e,my){
e = e || event;
var obj = e.relatedTarget||e.toElement;
if(judge(my,obj)) return;
alert('a');
}
function judge(parent,child){
return (document.all?parent.contains(child):parent.compareDocumentPosition(child))
}
</script>
可以参考:http://blog.csdn.net/huajian2008/archive/2009/03/05/3960343.aspx