background: #c7254e;
border:none;
color:#fff;
outline: none;
}
</style>
<script src="../js/jquery-1.12.4.min.js"></script>
<script>
$(function(){
//声明变量
var $input = $("#input");
$(".pop").click(function(){
return false;
});
$(".pop_confirm").click(function(){
$(".pop_con").fadeOut();
});
$(".close").click(function(){
$(".pop_con").fadeOut();
});
$(".pop_con").click(function(){
$(this).fadeOut();
});
//点击增加按钮，新增元素
$("#add").click(function(){
var $inputVal = $input.val();
//如果输入值为空，出现弹框提示
if($inputVal == ""){
$(".pop_con").fadeIn();
return false
}
$input.val("");
var $li = $("<li><h3>"+$inputVal+"</h3><p><a class='delete' href='javascript:void(0);'>删除</a><a class='prev' href='javascript:void(0);'>上移</a><a class='next' href='javascript:void(0);'>下移</a></p></li>");
$("ul").append($li);
});
//使用事件委托写在一起，提高性能
$("ul").delegate("li a","click",function(){
//首先判断点击的是哪个a
if($(this).attr("class") == "prev"){
//判断是否存在该元素
if($(this).closest("li").prev().length ==0){
$(".pop_message").html("已到顶部!");
$(".pop_con").fadeIn();
return false
}
$(this).closest("li").prev().before($(this).closest("li"));
}else if($(this).attr("class") == "next"){
if($(this).closest("li").next().length ==0){
$(".pop_message").html("已到底部!");
$(".pop_con").fadeIn();
}
$(this).closest("li").next().after($(this).closest("li"));
}else{
$(this).closest("li").remove();
}
})
})
</script>
</head>
<body>
<div class="con">
<h3>To do list</h3>
<input type="text" id="input">
<button id="add">增加</button>
<ul class="ul">
<li>
<h3>学习html</h3>
<p>
<a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="delete">删除</a>
<a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="prev">上移</a>
<a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="next">下移</a>
