<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>todolist</title>
<style type="text/css">
.list_con{
400px;
margin:50px auto 0;
}
.inputtxt{
350px;
height:30px;
border:1px solid #ccc;
padding:0px;
text-indent:10px;
}
.inputbtn{
40px;
height:32px;
padding:0px;
border:1px solid #ccc;
}
.list{
margin:0;
padding:0;
list-style:none;
margin-top:20px;
}
.list li{
height:30px;
line-height:30px;
border-bottom:1px solid #ccc;
}
.list li span{
float:left;
}
.list li a{
float:right;
text-decoration:none;
margin:0 10px;
}
</style>
<script type="text/javascript" src="js/jquery-1.12.4.min.js"></script>
<script type="text/javascript">
$(function(){
$('#btn1').click(function(){
var txt = $('#txt1').val();
$('#txt1').val('');
if(txt==''){
alert('请输入内容！');
return;
}
$li = $('<li><span>'+ txt +'</span><a href="javascript:;" class="up"> ↑ </a><a href="javascript:;" class="down"> ↓ </a><a href="javascript:;" class="del">删除</a></li>');
$li.appendTo('#list');
});
/*
$('.del').click(function() {
$(this).parent().remove();
});
*/
$('#list').delegate('a', 'click', function() {
var handler = $(this).attr('class');
if(handler=='del'){
$(this).parent().remove();
}
if(handler=='up'){
if($(this).parent().prev().length==0)
{
alert('到顶了！');
return;
}
$(this).parent().insertBefore($(this).parent().prev());
}
if(handler=='down'){
if($(this).parent().next().length==0)
{
alert('到底了！');
return;
}
$(this).parent().insertAfter($(this).parent().next());
}
});
})
</script>
</head>
<body>
<div class="list_con">
<h2>To do list</h2>
<input type="text" name="" id="txt1" class="inputtxt">
<input type="button" name="" value="增加" id="btn1" class="inputbtn">
<ul id="list" class="list">
<li><span>学习html</span><a href="javascript:;" class="up"> ↑ </a><a href="javascript:;" class="down"> ↓ </a><a href="javascript:;" class="del">删除</a></li>
<li><span>学习css</span><a href="javascript:;" class="up"> ↑ </a><a href="javascript:;" class="down"> ↓ </a><a href="javascript:;" class="del">删除</a></li>
<li><span>学习javascript</span><a href="javascript:;" class="up"> ↑ </a><a href="javascript:;" class="down"> ↓ </a><a href="javascript:;" class="del">删除</a></li>
</ul>
</div>
</body>
</html>
图片效果：
