效果图：
代码如下：
<html>
<head>
<style>
*{padding:0;margin:0}
ul,li{list-style:none}
.left{float:left}
.right{float:left}
.page_container{height: 30px; line-height: 30px;width: 510px;overflow: hidden;text-align: center;padding: 30px 0;color: #757575;}
.page_num_container{width: 301px;margin:0 10px;border:1px solid #ccc; border-right:0;
box-sizing: border-box;overflow: hidden;position: relative;height: 32px;}
.page_num_container ul{position: absolute;top: 0;}
.page_num_container ul li{float: left;width: 30px;border-right:1px solid #ccc ;box-sizing: border-box;text-align: center;cursor: pointer;}
.page_num_container ul li:hover,.page_num_container ul li.active{ background: #f4a100;color: #fff;}
.page_btn{width: 60px;border:1px solid #ccc;box-sizing: border-box;cursor: pointer;}
.page_btn:hover{ background: #f4a100;color: #fff;}
.all_page:hover{background:none;color: #757575;}
.prev_btn{margin-right: 10px;}
</style>
<script src="http://cdn.bootcss.com/jquery/3.2.1/jquery.min.js"></script>
</head>
<body>
<!--页码-->
<p class="page_container center">
<p class="page_btn prev_page left">上一页</p>
<p class="page_num_container left" id="page_num_container">
<ul>
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
<li>6</li>
<li>7</li>
<li>8</li>
<li>9</li>
<li>10</li>
<li>11</li>
<li>12</li>
<li>13</li>
<li>14</li>
<li>15</li>
<li>16</li>
<li>17</li>
<li>18</li>
<li>19</li>
<li>20</li>
<li>21</li>
</ul>
</p>
<p class="page_btn next_page left">下一页</p>
<p class="page_btn all_page right">共21页</p>
</p>
<!--页码-->
<script>
function page(){
var contain=$(".page_num_container");
var ul= contain.children("ul");
var li = ul.children("li");
var length= li.length;
var index=0;
var leftIndex=0;
var prev_btn= contain.siblings(".prev_page");
var next_btn= contain.siblings(".next_page ");
ul.css("width",li.outerWidth()*length);
change_page(index);
function change_page(eqindex){
if(eqindex<0 )
{
index=0;
}
else if(eqindex>=length ){
index=length-1;
}
if(index-4<=0){
leftIndex=0;
}
else if(index>length-10)
{
leftIndex=Math.ceil(length/2);
}
else{
leftIndex=index-4;
}
ul.animate({"left":"-"+leftIndex*li.outerWidth()+"px"},200);
li.eq(index).addClass("active").siblings(li).removeClass("active");
}
prev_btn.click(function(){
index=index-1;
change_page(index);
})
next_btn.click(function(){
index=index+1;
change_page(index);
})
li.click(function(){
index=$(this).index();
change_page(index);
})
}
page()
</script>
</body>
</html>
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