JavaScript实例_01-CFANZ编程社区

效果图：
在这里插入图片描述
功能：首尾页跳转，限制首尾页，标出当前在第几页，精准跳转到底*页，获取总页数
代码：
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .st1 {
            width: 90%;
            height: 32px;
            background-color: #ddd;
            margin-left: 5%;
            margin-top: 30px;
        }
        
        .st2 {
            width: 60px;
            height: 32px;
            background-color: #2ac;
            float: left;
            margin-left: 6px;
            color: honeydew;
            text-align: center;
            line-height: 32px;
            font-size: 13px;
        }
        
        .chosed {
            background-color: red;
        }
    </style>

</head>

<body>
    <!-- <input type="button" value="确定" onclick="m1(10)"> -->
    <div id="div1" class="st1"></div>
</body>
<script type="text/javascript">
    m1(13, 256, 10); //当前页索引，总页数，每页数量

    function m1(index, allnum, pagesize) {
        var allpage = allnum / pagesize;
        allpage = parseInt(allpage);
        allpage = allnum % 10 > 0 ? allpage + 1 : allpage;
        if (index < 1) {
            index = 1;
        }
        if (index > allpage) {
            index = allpage;
        }
        var x = document.getElementById("div1"); //根据id获取关键字
        var h = '<div class="st2" οnclick="m1(1,' + allnum + ',' + pagesize + ')">首页</div>';
        h += '<div class="st2" οnclick="m1(' + (index - 1) + ',' + allnum + ',' + pagesize + ')">上一页</div>';
        if (index < 3) {
            if (index == 1) {
                h += '<div class="st2 chosed" οnclick="m1(1,' + allnum + ',' + pagesize + ')">1</div>';
                h += '<div class="st2" οnclick="m1(2 ,' + allnum + ',' + pagesize + ')">2</div>';
            } else {
                h += '<div class="st2" οnclick="m1(1,' + allnum + ',' + pagesize + ')">1</div>';
                h += '<div class="st2  chosed" οnclick="m1(2 ,' + allnum + ',' + pagesize + ')">2</div>';
            }
            h += '<div class="st2" οnclick="m1(3,' + allnum + ',' + pagesize + ')">3</div>';
            h += '<div class="st2" οnclick="m1(4,' + allnum + ',' + pagesize + ')">4</div>';
            h += '<div class="st2" οnclick="m1(5,' + allnum + ', ' + pagesize + ') ">5</div>';
        }
        if (index >= 3 && index <= (allpage - 2)) {
            h += '<div class="st2" οnclick="m1(' + (index - 2) + ',' + allnum + ',' + pagesize + ')">' + (index - 2) + '</div>';
            h += '<div class="st2" οnclick="m1(' + (index - 1) + ',' + allnum + ',' + pagesize + ')">' + (index - 1) + '</div>';
            h += '<div class="st2 chosed">' + index + '</div>';
            h += '<div class="st2" οnclick="m1(' + (index + 1) + ',' + allnum + ',' + pagesize + ')">' + (index + 1) + '</div>';
            h += '<div class="st2" οnclick="m1(' + (index + 2) + ',' + allnum + ',' + pagesize + ')">' + (index + 2) + '</div>';
        }
        if (index > (allpage - 2)) {
            h += '<div class="st2" οnclick="m1(' + (allpage - 4) + ',' + allnum + ',' + pagesize + ')">' + (allpage - 4) + '</div>';
            h += '<div class="st2" οnclick="m1(' + (allpage - 3) + ',' + allnum + ',' + pagesize + ')">' + (allpage - 3) + '</div>';
            h += '<div class="st2" οnclick="m1(' + (allpage - 2) + ',' + allnum + ',' + pagesize + ')">' + (allpage - 2) + '</div>';
            if (index == allpage) {
                h += '<div class="st2" οnclick="m1(' + (allpage - 1) + ',' + allnum + ',' + pagesize + ')">' + (allpage - 1) + '</div>';
                h += '<div class="st2  chosed" οnclick="m1(' + allpage + ',' + allnum + ', ' + pagesize + ') ">' + allpage + '</div>';
            } else {
                h += '<div class="st2   chosed" οnclick="m1(' + (allpage - 1) + ',' + allnum + ',' + pagesize + ')">' + (allpage - 1) + '</div>';
                h += '<div class="st2" οnclick="m1(' + allpage + ',' + allnum + ', ' + pagesize + ') ">' + allpage + '</div>';
            }
        }
        h += '<div class="st2" οnclick="m1(' + (index + 1) + ',' + allnum + ',' + pagesize + ')">下一页</div>';
        h += '<div class="st2" οnclick="m1(' + allpage + ',' + allnum + ',' + pagesize + ')">尾页</div>';
        h += '<div class="st2">共' + allpage + '页</div>';
        h += '<div class="st2">共' + allnum + '条</div>';
        h += '<div class="st2"><input id="pageindex" type="text" style="width:50px;height:26px;border:0px;"></div>';
        h += '<div class="st2" οnclick="gopage(' + allnum + ',' + pagesize + ')">跳转</div>';
        x.innerHTML = h;
    }

    function gopage(allnum, pagesize) {
        var text = document.getElementById("pageindex").value;
        text = parseInt(text);
        m1(text, allnum, pagesize);
    }
</script>

</html>