jQuery动态操作表单示例【基于table表格】

本文实例讲述了jQuery动态操作表单。分享给大家供大家参考，具体如下：

<html>
<head>
  <title>jquery表格操作</title>
  <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
  <style type="text/css">
    table
    {
      border: black solid 1px;
      border-collapse: collapse;
    }
    td
    {
      border: black solid 1px;
      padding: 3px;
    }
    .td_Num
    {
      width: 60px;
      text-align: center;
    }
    .td_Item
    {
      width: 160px;
      text-align: center;
    }
    .td_Oper
    {
      width: 120px;
      text-align: center;
    }
    .td_Oper span
    {
      cursor: pointer;
    }
  </style>
</head>
<body>
  <table>
    <tr>
      <td class='td_Num'>
        序号
      </td>
      <td class='td_Item'>
        步骤名称
      </td>
      <td class='td_Item'>
        步骤描述
      </td>
      <td class='td_Oper'>
        相关操作 <a href="#" rel="external nofollow" onclick="add_line();">添加</a>
      </td>
    </tr>
  </table>
  <table id="content">
  </table>
  <input type="button" value="提交数据" id="btnSubmit" onclick="SaveData()" />
</body>
</html>
<script type="text/javascript">
  var currentStep = 0;
  var max_line_num = 0;
  //添加新记录
  function add_line() {
    max_line_num = $("#content tr:last-child").children("td").html();
    if (max_line_num == null) {
      max_line_num = 1;
    }
    else {
      max_line_num = parseInt(max_line_num);
      max_line_num += 1;
    }
    $('#content').append(
    "<tr id='line" + max_line_num + "'>" +
      "<td class='td_Num'>" + max_line_num + "</td>" +
      "<td class='td_Item'><input type='text' class='stepName' value='步骤名称" + max_line_num + "'></input></td>" +
      "<td class='td_Item'><input type='text' class='stepDescription' value='步骤描述" + max_line_num + "'></td>" +
      "<td class='td_Oper'>" +
        "<span onclick='up_exchange_line(this);'>上移</span> " +
        "<span onclick='down_exchange_line(this);'>下移</span> " +
        "<span onclick='remove_line(this);'>删除</span> " +
      "</td>" +
    "</tr>");
  }
  //删除选择记录
  function remove_line(index) {
    if (index != null) {
      currentStep = $(index).parent().parent().find("td:first-child").html();
    }
    if (currentStep == 0) {
      alert('请选择一项!');
      return false;
    }
    if (confirm("确定要删除改记录吗？")) {
      $("#content tr").each(function () {
        var seq = parseInt($(this).children("td").html());
        if (seq == currentStep) { $(this).remove(); }
        if (seq > currentStep) { $(this).children("td").each(function (i) { if (i == 0) $(this).html(seq - 1); }); }
      });
    }
  }
  //上移
  function up_exchange_line(index) {
    if (index != null) {
      currentStep = $(index).parent().parent().find("td:first-child").html();
    }
    if (currentStep == 0) {
      alert('请选择一项!');
      return false;
    }
    if (currentStep <= 1) {
      alert('已经是最顶项了!');
      return false;
    }
    var upStep = currentStep - 1;
    //修改序号
    $('#line' + upStep + " td:first-child").html(currentStep);
    $('#line' + currentStep + " td:first-child").html(upStep);
    //取得两行的内容
    var upContent = $('#line' + upStep).html();
    var currentContent = $('#line' + currentStep).html();
    $('#line' + upStep).html(currentContent);
    //交换当前行与上一行内容
    $('#line' + currentStep).html(upContent);
    $('#content tr').each(function () { $(this).css("background-color", "#ffffff"); });
    $('#line' + upStep).css("background-color", "yellow");
    event.stopPropagation(); //阻止事件冒泡
  }
  //下移
  function down_exchange_line(index) {
    if (index != null) {
      currentStep = $(index).parent().parent().find("td:first-child").html();
    }
    if (currentStep == 0) {
      alert('请选择一项!');
      return false;
    }
    if (currentStep >= max_line_num) {
      alert('已经是最后一项了!');
      return false;
    }
    var nextStep = parseInt(currentStep) + 1;
    //修改序号
    $('#line' + nextStep + " td:first-child").html(currentStep);
    $('#line' + currentStep + " td:first-child").html(nextStep);
    //取得两行的内容
    var nextContent = $('#line' + nextStep).html();
    var currentContent = $('#line' + currentStep).html();
    //交换当前行与上一行内容
    $('#line' + nextStep).html(currentContent);
    $('#line' + currentStep).html(nextContent);
    $('#content tr').each(function () { $(this).css("background-color", "#ffffff"); });
    $('#line' + nextStep).css("background-color", "yellow");
    event.stopPropagation(); //阻止事件冒泡
  }
  //保存数据
  function SaveData() {
    var data = "<root>";
    $('#content tr').each(function () {
      data += "<item>";
      var stepName = $(this).find("td:eq(1)").find("input").val();
      var stepDescription = $(this).find("td:eq(2)").find("input").val();
      data += "  <stepName>" + stepName + "</stepName>";
      data += "  <stepDescription>" + stepDescription + "</stepDescription>";
      data += "<item>";
    });
    data += "</root>";
    alert(data);
  }
</script>

使用本站在线HTML/CSS/JavaScript代码运行工具：http://tools.jb51.net/code/HtmlJsRun，测试运行上述代码可得到如下运行效果：

更多关于jQuery相关内容感兴趣的读者可查看本站专题：《jQuery表格(table)操作技巧汇总》、《jQuery操作xml技巧总结》、《jQuery form操作技巧汇总》、《jQuery常用插件及用法总结》、《jQuery扩展技巧总结》及《jquery选择器用法总结》

希望本文所述对大家jQuery程序设计有所帮助。