Js实现Table动态添加一行的小例子

  <form id="form1" runat="server">
     <div>
           <table id="orderTable" border='' cellpadding="" cellspacing="" style="border-collapse: collapse; border-color:#C0C0C0;" rules="none" width="80%" align="center">
                 <thead>
                     <tr>
                         <th style="width: 20%;">申报部门</th>
                         <th style="width: 20%;">街镇</th>
                         <th style="width: 20%;">路段名称</th>
                         <th style="width: 30%;">起止路名</th>
                         <th>操作</th>
                     </tr>
                 </thead>
                 <tr id="row0">
                     <td>
                         <select id="UrbanDepNo0" name="UrbanDepNo" style="width:90%">
                         <option value="">三林城管署</option>
                         <option value="">港城城管署</option>
                         <option value="">惠南城管署</option>
                         <option value="">金桥城管署</option>
                         <option value="">陆家嘴城管办</option>
                         <option value="">川沙城管署</option>
                         </select>
                     </td>
                     <td>
                         <input type="text" id="LocNo0" name="LocNo" style="width:90%"/>

                     </td>
                     <td>
                         <input type="text" id="RoadSectionName0" name="RoadSectionName" style="width:90%"/>
                     </td>
                     <td>
                         <input type="text" id="StStartRoad0" name="StStartRoad" style="width:45%"/>--
                         <input type="text" id="EndRoadName0" name="EndRoadName" style="width:45%"/>
                     </td>
                     <td>
                         <input type="button" name="delete"  value="删 除" style="width:80px" onclick="deleteSelectedRow(0)" />

                     </td>
                 </tr>
                 <tr>
                     <td align="center" colspan="">
                     <br />
                         <input type="button" name="insert"  value="增加一行" style="width:80px" onclick="insertNewRow()" />&nbsp&nbsp
                             <input type="button"  value=" 保    存 "  style="width:80px"  onclick="GetValue()" />
                     </td>
                 </tr>
             </table>
     </div>
      <div style="MARGIN: 40px auto;">
          <table id="TableInfo" border='' cellpadding="" cellspacing="" style="border-collapse: collapse; border-color:#C0C0C0;" width="80%" align="center">
                     <tr>
                             <td align="center">
                                 申报部门
                             </td>
                             <td align="center">
                                 街镇
                             </td>
                             <td align="center">
                                 路段名称
                             </td>
                             <td align="center">
                                 起止路名
                             </td>
                             <td align="center">
                                 操作
                             </td>
                     </tr>
             </table>
      </div>
     </form>

    <script src="jquery.min.js" type="text/javascript"></script>
     <script type="text/javascript" language='javascript'>
  //声明全局变量
  var formvalue = "";
  var flag = ;
  var index = ;
  var firstCell = "";
  var secondCell = "";
  var thirdCell = "";
  var fourthCell = "";

  $(function() {
      //初始化第一行
      firstCell = $("#row0 td:eq(0)").html();
      secondCell = $("#row0 td:eq(1)").html();
      thirdCell = $("#row0 td:eq(2)").html();
      fourthCell = $("#row0 td:eq(3)").html();
  });

  //-----------------新增一行-----------start---------------

  function insertNewRow() {
      //获取表格有多少行
      var rowLength = $("#orderTable tr").length;
      //这里的rowId就是row加上标志位的组合。是每新增一行的tr的id。
      var rowId = "row" + flag;

      //每次往下标为flag+1的下面添加tr,因为append是往标签内追加。所以用 after
      var insertStr = "<tr id=" + rowId + ">" + "<td style='width: 20%'>" + firstCell + "</td>" + "<td style='width: 20%'>" + secondCell + "</td>" + "<td style='width: 20%'>" + thirdCell + "</td>" + "<td style='width: 30%'>" + fourthCell + "</td>" + "<td><input type='button' name='delete' value='删除' style='width:80px'                                                          onclick='deleteSelectedRow(\"" + rowId + "\")' />"; + "</tr>";
      //这里的行数减2，是因为要减去底部的一行和顶部的一行，剩下的为开始要插入行的索引
      $("#orderTable tr:eq(" + (rowLength - ) + ")").after(insertStr); //将新拼接的一行插入到当前行的下面
      //为新添加的行里面的控件添加新的id属性。
      $("#" + rowId + " td:eq(0)").children().eq().attr("id", "UrbanDepNo" + flag);
      $("#" + rowId + " td:eq(1)").children().eq().attr("id", "LocNo" + flag);
      $("#" + rowId + " td:eq(2)").children().eq().attr("id", "RoadSectionName" + flag);
      $("#" + rowId + " td:eq(3)").children().eq().attr("id", "StStartRoad" + flag);
      $("#" + rowId + " td:eq(3)").children().eq().attr("id", "EndRoad" + flag);
      //每插入一行，flag自增一次
      flag++;
  }

  //-----------------删除一行，根据行ID删除-start--------    

  function deleteSelectedRow(rowID) {
      if (confirm("确定删除该行吗？")) {
          $("#" + rowID).remove();
      }
  }
  //-----------------获取表单中的值----start--------------

  function GetValue() {
      var value = "";
      $("#orderTable tr").each(function(i) {
          if (i >= ) {
              $(this).children().each(function(j) {
                  if ($("#orderTable tr").eq(i).children().length -  != j) {
                      value += $(this).children().eq().val() + "," //获取每个单元格里的第一个控件的值
                      if ($(this).children().length > ) {
                          value += $(this).children().eq().val() + "," //如果单元格里有两个控件，获取第二个控件的值
                      }
                  }
              });
              value = value.substr(, value.length - ) + "#"; //每个单元格的数据以“，”分割，每行数据以“#”号分割
          }
      });
      value = value.substr(, value.length);
      ReceiveValue(value);
      //             $("#formvalue").val(value);
      //             $("formvalue").submit();
  }
  //-------------------接收表单中的值-----------------------------

  function ReceiveValue(str) {
      var Str = str.split('#');
      if (Str[] != "") {
          for (var i = ; i < Str.length - ; i++) {
              var value = Str[i].split(',');
              var dept = value[];
              var street = value[]
              var section = value[];
              var Broad = value[];
              var Eroad = value[];
              insertTable(dept, street, section, Broad, Eroad);
              $("input[type='text']").val("");
              $("select[name='UrbanDepNo']").val("");
          }
      }
  }

  //---------------将表单中的数据添加到新表中---------------------        

  function insertTable(dept, street, section, Broad, Eroad) {
      var department = "";
      switch (dept) {
      case "":
          department = "三林城管署";
          break;
      case "":
          department = "港城城管署";
          break;
      case "":
          department = "惠南城管署";
          break;
      case "":
          department = "金桥城管署";
          break;
      case "":
          department = "陆家嘴城管办";
          break;
      case "":
          department = "川沙城管署";
          break;
      default:
          break;
      }

      //将接收到数据添加到新表TableInfo中。
      $('#TableInfo').append("<tr id=" + index + "><td align='center'>" + department + "</td>  <td align='center'>" + street + "</td><td align='center'>" + section + "</td>  <td align='center'>" + Broad + "-" + Eroad + "</td> <td align='center'><a href='#' onclick='deltr(" + index + ")'>删 除</a></td></tr>");　
      index++;
  }

  //----------新表中的删除方法-----------

  function deltr(index) {
      if (confirm("确定删除吗?")) {
          $("tr[id='" + index + "']").remove();
      }
  }
     </script>