动态表格&全选

效果展示

PostForm.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>动态表格&全选</title>
    <link rel="stylesheet" href="../css/PostForm.css">
</head>
<body>
    <div>
        <input id="id" type="text" placeholder="请输入编号">
        <input id="name" type="text" placeholder="请输入姓名">
        <input id="gender" type="text" placeholder="请输入性别">
        <input id="btn_add" type="button" value="添加">
    </div>
    <table>
        <caption>学生信息表</caption>
        <tr>
            <th><input type="checkbox" name="cb" id="firstcb"></th>
            <th>编号</th>
            <th>姓名</th>
            <th>性别</th>
            <th>操作</th>
        </tr>
        <tr>
            <td><input type="checkbox" name="cb"></td>
            <td>1</td>
            <td>哈哈哈</td>
            <td>男</td>
            <td><a href="javascript:void(0);" onclick="del(this);">删除</a></td>
        </tr>

        <tr>
            <td><input type="checkbox" name="cb"></td>
            <td>2</td>
            <td>嘿嘿嘿</td>
            <td>男</td>
            <td><a href="javascript:void(0);" onclick="del(this);">删除</a></td>
        </tr>

        <tr>
            <td><input type="checkbox" name="cb"></td>
            <td>3</td>
            <td>小红红</td>
            <td>女</td>
            <td><a href="javascript:void(0);" onclick="del(this);">删除</a></td>
        </tr>
        <tr>
            <td><input type="checkbox" name="cb"></td>
            <td>4</td>
            <td>小伙子</td>
            <td>女</td>
            <td><a href="javascript:void(0);" onclick="del(this);">删除</a></td>
        </tr>
    </table>
    <div>
        <input type="button" id="selectAll" value="全选">
        <input type="button" id="unSelectAll" value="全不选">
        <input type="button" id="selectRev" value="反选">
    </div>


    <script src="../js/PostForm.js"></script>
  </body>
</ html>

PostForm.css

body {
    background: url("../image/2.png") no-repeat center;
    /*设置图片适应整个页面*/
    background-size: 100% 100%;
    background-attachment:fixed;
}


table{
    border: 1px solid;
    margin: auto;
    width: 500px;
color: #CC00FF;
}

td,th{
    text-align: center;
    border: 1px solid;
}
div{
    text-align: center;
    margin: 50px;
    margin-top: 30px;

}

PostForm.js

    //在页面加载完成后绑定事件
window.onload = function () {
    //给全选按钮绑定单击事件
    document.getElementById("selectAll").onclick = function (ev) {

        //全选
        //1.获取所有的checkbox
        var cbs = document.getElementsByName("cb");
        //遍历
        for (var i = 0; i < cbs.length; i++) {
            //3.设置每一个cb的状态为选中  checked  = true
            cbs[i].checked = true;
        }
    }

    document.getElementById("unSelectAll").onclick = function (ev) {
        //全不选
        //1.获取所有的checkbox
        var cbs = document.getElementsByName("cb");
        //遍历
        for (var i = 0; i < cbs.length; i++) {
            //3.设置每一个cb的状态为不选中  checked  = false
            cbs[i].checked = false;
        }
    }

    document.getElementById("selectRev").onclick = function (ev) {
        //反选
        //1.获取所有的checkbox
        var cbs = document.getElementsByName("cb");
        //遍历
        for (var i = 0; i < cbs.length; i++) {
            //3.设置每一个cb的状态
            cbs[i].checked = !cbs[i].checked;
        }
    }

    document.getElementById("firstcb").onclick = function () {
        //1.获取所有的checkbox
        var cbs = document.getElementsByName("cb");
        //遍历
        for (var i = 0; i < cbs.length; i++) {
            //3.设置每一个cb的状态和第一个cb的状态相同
            cbs[i].checked = this.checked;
        }
    }
}

//使用innerHTML添加
document.getElementById("btn_add").onclick = function () {
    //获取文本框的内容
    var id = document.getElementById("id").value;
    var name = document.getElementById("name").value;
    var gender = document.getElementById("gender").value;

    //获取table
    var table = document.getElementsByTagName("table")[0];

    //追加一行
    table.innerHTML += "<tr>\n" +
        "        <td><input type='checkbox' name='cb'></td>\n" +
        "        <td>" + id + "</td>\n" +
        "        <td>" + name + "</td>\n" +
        "        <td>" + gender + "</td>\n" +
        "        <td><a href=\"javascript:void(0);\" onclick=\"del(this);\" >删除</a></td>\n" +
        "    </tr>";
}

//删除方法
function del(obj) {
    var table = obj.parentNode.parentNode.parentNode;
    var tr = obj.parentNode.parentNode;
    table.removeChild(tr);

}
posted @ 2019-08-08 17:06  难得糊涂1998  阅读(205)  评论(0)  编辑  收藏  举报