jQuery--修改表单数据并提交

目的:

​点击‘编辑’,弹出对话框,修改数据。

主要知识点:

prevAll(),获取同级别本元素前面的所有元素。

代码:
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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <style>
        .modal{
            position: fixed;
            left:50%;
            top: 50%;
             400px;
            height: 300px;
            background-color: #DDDDDD;
            margin-left: -200px;
            margin-top: -150px;
        }
        .hide{
            display: none;
        }
    </style>
</head>
<body>
    <table border="1">
        <thead></thead>
        <tbody>
            <tr>
                <td>h1</td>
                <td>192.168.1.1</td>
                <td>111</td>
                <td onclick="GetPrev(this)">编辑</td>
            </tr>
        <!--1.弹出框-->
        <!--2.取出表格数据-->
        <!--3.将数据填充到弹出框-->
            <tr>
                <td>h2</td>
                <td>192.168.1.2</td>
                <td>222</td>
                <td onclick="GetPrev(this)">编辑</td>
            </tr>
            <tr>
                <td>h3</td>
                <td>192.168.1.3</td>
                <td>333</td>
                <td onclick="GetPrev(this)">编辑</td>
            </tr>
        </tbody>
    </table>
    <div id="dialog" class="modal hide">
        <form action="" method="get">
            <p>主机名:<input type="text" id="hostname" /></p>
            <p>IP:<input type="text" id="ip" /></p>
            <p>端口:<input type="text" id="port" /></p>
            <input type="submit" value="提交" onclick="return SubmitForm()">
            <!--当onclick返回false,submit不进行提交。-->
            <input type="button" value="取消" onclick="Cancel()">
        </form>
    </div>
    <script type="text/javascript" src="jquery-2.1.4.min.js"></script>
    <script type="text/javascript">
        function GetPrev(arg){
            var list=[];
            $.each($(arg).prevAll(),function(i){
                var item=$(arg).prevAll()[i];
                //this
                var text=$(item).text();
                list.push(text);
            });
            var new_list=list.reverse();
            //在弹出框的hostname中设置值
            $('#hostname').val(new_list[0]);
            $('#ip').val(new_list[1]);
            $('#port').val(new_list[2]);
 
            $('#dialog').removeClass('hide');
        }
        function SubmitForm(){
            //获取form表单中的input值,判断是否为空;
            var ret=true;
            //遍历所有的input["type=text"],只要有空值,就将ret设置为false;
            $(':text').each(function(){
                //$(this)=要循环的每一个元素
                var value=$(this).val();
                if(value.trim().length==0){
                    $(this).css('border-color','red');
                    alert("不能为空");
                    ret=false;
                }else{
                    $(this).css('border-color','green');
                }
            });
            return ret;
        }
        function Cancel(){
            $('#dialog').addClass('hide');
        }
    </script>
</body>
</html>
效果:​



















原文地址:https://www.cnblogs.com/daliangtou/p/5205281.html