为什么el.innerHTML能直接获取到"赞"？
<!DOCTYPE html>
<html>
<head>
<title>21 Dece</title>
<meta charset="utf-8">
<style type="text/css">
body { font-size: 12px; line-height: 120%; text-align: center; color:#333; padding: 20px;}
li { list-style: none}
a { color: #333; text-decoration: none;}
a:hover { text-decoration: underline;}
* { margin: 0; padding: 0; border: none;}
.clearfix:after { content:"."; display:block; height:0; clear:both; visibility:hidden}
.clearfix { *height:1%;}
#list { margin: 0 auto; text-align: left; width: 540px;}
.box { border-top: 1px solid #eee; position: relative; width: 540px; padding: 20px 0}
.box:hover .close { display: block;}
.close { display: none; top:0px; right: 0px; width: 28px; height: 28px; border: 1px solid #eee; position: absolute; background: #f2f4f7; line-height: 27px; text-align: center;}
.close:hover { background: #c8d2e2; text-decoration: none;}
.head { float: left; width: 60px; height: 60px; margin-right: 10px;}
.content { float: left; width: 440px;}
.main { margin-bottom: 10px;}
.txt { margin-bottom: 10px;}
.user { color: #369; }
.pic { margin-right: 5px; width: 200px; border: 1px solid #eee;}
.info { height: 20px; line-height: 19px; font-size: 12px; margin: 0 0 10px 0;}
.info .time { color: #ccc; float: left; height: 20px; padding-left: 20px; background: url("images/bg1.jpg") no-repeat left top;}
.info .praise { color: #369; float: right; height: 20px; padding-left: 18px; background: url("images/bg2.jpg") no-repeat left top;}
.info .praise:hover { text-decoration: underline; background: url("images/bg3.jpg") no-repeat left top;}
.praises-total { margin: 0 0 10px 0; height: 20px; background: url("images/praise.png") no-repeat 5px 5px rgb(247, 247, 247); padding: 5px 0 5px 25px; line-height: 19px;}
.comment-box { padding: 10px 0; border-top: 1px solid #eee;}
.comment-box:hover { background: rgb(247, 247, 247);}
.comment-box .myhead { float: left; width: 30px; height: 30px; margin-right: 10px;}
.comment-box .comment-content { float: left; width: 400px; }
.comment-box .comment-content .comment-time { color: #ccc; margin-top: 3px; line-height: 16px; position: relative;}
.comment-box .comment-content .comment-praise { display: none; color: #369; padding-left: 17px; height: 20px; background: url("images/praise.png") no-repeat; position: absolute; bottom: 0px; right: 44px;}
.comment-box .comment-content .comment-operate { display: none; color: #369; height: 20px; position: absolute; bottom: 0px; right: 10px;}
.comment-box .comment-content:hover .comment-praise { display: inline-block;}
.comment-box .comment-content:hover .comment-operate { display: inline-block;}
.text-box .comment { border: 1px solid #eee; display: block; height: 15px; width: 428px; padding: 5px; resize: none; color: #ccc}
.text-box .btn { font-size: 12px; font-weight: bold; display: none; float: right; width: 65px; height: 25px; border: 1px solid #0C528D; color: #fff; background: #4679AC;}
.text-box .btn-off { border: 1px solid #ccc; color: #ccc; background: #F7F7F7;}
.text-box .word{ display: none; float: right; margin: 7px 10px 0 0; color: #666;}
.text-box-on .comment{ height: 50px; color: #333;}
.text-box-on .btn{ display: inline;}
.text-box-on .word{ display: inline;}
</style>
<script type="text/javascript">
window.onload= function () {
var list = document.getElementById('list');
var lis = list.children;
var timer;
//定义删除节点函数
// A.5.2.点击关闭按钮则触发函数removeNode.获取节点的父节点再删除节点本身
function removeNode(node){
node.parentNode.removeChild(node);
}
// B.3.赞分享
// box即整个li
function praiseBox(box,el){
// 在整个li中获取当前总赞praises-total
var praiseElement = box.getElementsByClassName("praises-total")[0];
// B.3.1.praises-total中已有的点赞数
var oldTotal = parseInt(praiseElement.getAttribute("total"));
// B.3.2.在
var txt = el.innerHTML;
document.write(txt); //为什么直接弹出“赞” 而不是其他的文本？
}
// A.1.循环遍历每个li,并添加onclick事件
for(var i = 0; i<lis.length; i++){
lis[i].onclick = function(e){
// A.2.兼容ie下也能获取事件对象
e = e || window.event;
// A.3.用一个变量来存储触发元素
var el = e.srcElement;
//alert(el);此时的a的srcElement是href中的javascript:;
// A.4.获取a标签,判断类名
switch(el.className){
case "close":
// A.5.1.如果关闭钮被点击则触发删除节点函数
removeNode(el.parentNode);
break;
// B.1.赞分享.如果a的类名是praise
case "praise":
// B.2.通过a(点赞)获取当前整个li
praiseBox(el.parentNode.parentNode.parentNode,el);
break;
}
}
}
}
</script>
</head>
<body>
<ul id="list">
<li class="box clearfix">
<a class="close" href="javascript:;">×</a>
<img class="head" src="http://img1.sycdn.imooc.com//536b4ad10001c94f00620060.jpg" alt=""/>
<div class="content">
<div class="main">
<p class="txt">
<span class="user">Andy：</span>轻轻的我走了，正如我轻轻的来；我轻轻的招手，作别西天的云彩。
</p>
<img class="pic" src="http://img1.sycdn.imooc.com//536b4aec0001a70f01960228.jpg" alt=""/>
</div>
<div class="info clearfix">
<span class="time">02-14 23:01</span>
<a class="praise" href="javascript:;">赞</a>
</div>
<div class="praises-total" total="4" style="display: block;">4个人觉得很赞</div>
<ul class="comment-list">
<li class="comment-box clearfix" user="self">
<img class="myhead" src="http://img1.sycdn.imooc.com//536b4b050001b06c00310030.jpg" alt=""/>
<div class="comment-content">
<p class="comment-text"><span class="user">我：</span>写的太好了。</p>
<p class="comment-time">
2014-02-19 14:36
<a href="javascript:;" class="comment-praise" total="1" my="0" style="display: inline-block">1 赞</a>
<a href="javascript:;" class="comment-operate">删除</a>
</p>
</div>
</li>
</ul>
<div class="text-box">
<textarea class="comment" autocomplete="off">评论…</textarea>
<button class="btn ">回 复</button>
<span class="word"><span class="length">0</span>/140</span>
</div>
</div>
</li>
<li class="box clearfix">
<a class="close" href="javascript:;">×</a>
<img class="head" src="http://img1.sycdn.imooc.com//536b4ad10001c94f00620060.jpg" alt=""/>
<div class="content">
<div class="main">
<p class="txt">
<span class="user">人在旅途：</span>三亚的海滩很漂亮。
</p>
<img class="pic" src="http://img1.sycdn.imooc.com//536b4aec0001a70f01960228.jpg" alt=""/>
</div>
<div class="info clearfix">
<span class="time">02-14 23:01</span>
<a class="praise" href="javascript:;">赞</a>
</div>
<div class="praises-total" total="0" style="display: none;"></div>
<ul class="comment-list">
<li class="comment-box clearfix" user="other">
<img class="myhead" src="http://img1.sycdn.imooc.com//536b4b050001b06c00310030.jpg" alt=""/>
<div class="comment-content">
<p class="comment-text"><span class="user">老鹰：</span>我也想去三亚。</p>
<p class="comment-time">
2014-02-19 14:36
<a href="javascript:;" class="comment-praise" total="0" my="0">赞</a>
<a href="javascript:;" class="comment-operate">回复</a>
</p>
</div>
</li>
</ul>
<div class="text-box">
<textarea class="comment" autocomplete="off">评论…</textarea>
<button class="btn ">回 复</button>
<span class="word"><span class="length">0</span>/140</span>
</div>
</div>
</li>
<li class="box clearfix">
<a class="close" href="javascript:;">×</a>
<img class="head" src="http://img1.sycdn.imooc.com//536b4ad10001c94f00620060.jpg" alt=""/>
<div class="content">
<div class="main">
<p class="txt">
<span class="user">小Y：</span>英国艺术家 Jane Perkins 能利用很多不起眼的东西进行创作，甚至是垃圾。首饰、纽扣、玩具等等都可以作为他创作的工具并创作出惟妙惟肖的画作，丝毫不逊色于色彩丰富的颜料。
</p>
</div>
<div class="info clearfix">
<span class="time">02-11 13:17</span>
<a class="praise" href="javascript:;">赞</a>
</div>
<div class="praises-total" total="0" style="display: none;"></div>
<ul class="comment-list">
</ul>
<div class="text-box">
<textarea class="comment" autocomplete="off">评论…</textarea>
<button class="btn ">回 复</button>
<span class="word"><span class="length">0</span>/140</span>
</div>
</div>
</li>
</ul>
</body>
</html>
