事件_常见事件演示和案例5_表格全选

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script>
        window.onload = function () {
            // document.getElementById("username").onblur = function () {
            //     alert("失去焦点")
            // }

            // document.getElementById("username").onmouseover = function () {
            //        alert("鼠标来了")
            // }

            // document.getElementById("username").onmousedown = function (event) {
            //           //alert("鼠标的点击了")
            //         alert(event.button);
            // }

            // document.getElementById("username").onkeydown = function (event) {
            //     alert("鼠标点击了")
            //     alert(event.button);
            // }
            // if (event.keyCode == 13){
            //     alert("提交表单");
            // }

            // document.getElementById("username").onchange = function (event) {
            //        alert("改变了...")
            // }
            //
            // document.getElementById("city").onchange = function (event) {
            //     alert("改变了...")
            // }

            // document.getElementById("form").onsubmit = function () {
            //     var  flag = false;
            //     return flag;
            // }



        }
        function checkForm() {
            return true;
        }
    </script>

</head>
<body>

<form action="#" id="form" onclick="return checkForm();">
    <input name="username" id="username">
    <select id="city">
        <option>--请选择--</option>
        <option>北京</option>
        <option>上海</option>
        <option>天津</option>
        <option>陕西</option>
    </select>
    <input type="submit" value="提交">
</form>
</body>
</html>

案例5_表格全选

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>表格全选</title>
    <style>
        table{
            border: 1px solid;
            width: 500px;
            margin-left: 30%;
        }

        td,th{
            text-align: center;
            border: 1px solid;
        }
        div{
            margin-top: 10px;
            margin-left: 30%;
        }

        .out{
            background-color: white;
        }

        .over{
            background-color: pink;
        }



    </style>

    <script>
        window.onload = function () {
            document.getElementById("selectAll").onclick = function () {
                var cbs = document.getElementsByName("cb");
                for (var i = 0; i< cbs.length;i++){
                    cbs[i].checked = true;
                }
            }

            document.getElementById("unSelectAll").onclick = function () {
                var cbs = document.getElementsByName("cb");
                for (var i = 0; i< cbs.length;i++){
                    cbs[i].checked = false;
                }
            }

            document.getElementById("selectRev").onclick = function () {
                var cbs = document.getElementsByName("cb");
                for (var i = 0; i< cbs.length; i++){
                    cbs[i].checked = !cbs[i].checked;
                }
            }

            document.getElementById("firstCb").onclick = function () {
                var cbs = document.getElementsByName("cb");
                for (var i = 0; i< cbs.length; i++){
                    cbs[i].checked = this.checked;
                }
            }

            var trs = document.getElementsByTagName("tr");
            for (var i = 0; i< trs.length; i++){
                trs[i].onmouseover = function () {
                    this.className = "over";
                }
                trs[i].onmouseout = function () {
                    this.className = "out";
                }
            }

        }
    </script>


</head>
<body>

<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>令狐冲</td>
        <td>男</td>
        <td><a href="javascript:void(0);">删除</a></td>
    </tr>

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

    <tr>
        <td><input type="checkbox" name="cb"></td>
        <td>3</td>
        <td>岳不群</td>
        <td>?</td>
        <td><a href="javascript:void(0);">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>
</body>
</html>

posted on 2022-08-05 14:47 淤泥不染阅读(12) 评论(0) 编辑收藏举报