我有一个包含一行或多行的html表。我的表中有4列，其中一列是复选框。两个按钮有“AddRowAbove”和“AddRowBelow”。选中特定复选框并单击按钮时，应根据按钮名称添加新行。我的代码看起来不确定如何实现结果。
function addNewRowAbove() {
alert("actioned !!!");
var rowNumber = document.getElementById("rowIndex").value;
var rowNumberNew = parseInt(rowNumber) - 1;
alert(rowNumber + " - " + rowNumberNew);
var newRow = $('<tr/>').attr('id', 'row' + rowNumberNew);
newRow.html('<td><input type="checkbox" name="radio1" id="radio' + rowNumberNew + '"></input><input type="hidden" id="rowIndex' + rowNumberNew + '" value="' + rowNumberNew + '"/></td><td><input type="text" name="empid" id="empid' + rowNumberNew + '"></input></td><td><input type="text" name="empfname" id="empfname' + rowNumberNew + '"></input></td><td><input type="text" name="emplname" id="emplname' + rowNumberNew + '"></input></td>');
$('#maintable tbody').append(newRow);
}
function addNewRowBelow() {
alert("actioned !!!");
var rowNumber = document.getElementById("rowIndex").value;
var rowNumberNew = parseInt(rowNumber) + 1;
alert(rowNumber + " - " + rowNumberNew);
var newRow = $('<tr/>').attr('id', 'row' + rowNumberNew);
newRow.html('<td><input type="checkbox" name="radio1" id="radio' + rowNumberNew + '"></input><input type="hidden" id="rowIndex' + rowNumberNew + '" value="' + rowNumberNew + '"/></td><td><input type="text" name="empid" id="empid' + rowNumberNew + '"></input></td><td><input type="text" name="empfname" id="empfname' + rowNumberNew + '"></input></td><td><input type="text" name="emplname" id="emplname' + rowNumberNew + '"></input></td>');
$('#maintable tbody').append(newRow);
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form>
<table id="maintable" width="50%" cellpadding="0" cellspacing="0" border="#729111 1px solid">
<tr>
<th align="center">Select</th>
<th align="center">Employee ID</th>
<th align="center">First Name</th>
<th align="center">Last Name</th>
</tr>
<tr>
<td><input type="checkbox" name="radio" id="radio"></input><input type="hidden" id="rowIndex" value="1" /></td>
<td><input type="text" name="empid"></input>
</td>
<td><input type="text" name="empfname"></input>
</td>
<td><input type="text" name="emplname"></input>
</td>
</tr>
<tr>
<td><input type="checkbox" name="radio1" id="radio1"></input><input type="hidden" id="rowIndex" value="2" /></td>
<td><input type="text" name="empid1"></input>
</td>
<td><input type="text" name="empfname1"></input>
</td>
<td><input type="text" name="emplname1"></input>
</td>
</tr>
<tr>
<td></td>
<td> <input type="submit" name="AddRowAbove" value="AddRowAbove" onclick="addNewRowAbove()"></td>
<td> <input type="submit" name="AddRowBelow" value="AddRowBelow" onclick="addNewRowBelow()"></td>
<td></td>
</tr>
</table>
</form>
答案 0 :(得分：3)
我在两个函数中添加var selectedRow = $( "input:checked" ).parent().parent();以查找checked元素的父行，然后根据点击的按钮使用$(newRow).insertBefore(selectedRow);或$(newRow).insertAfter(selectedRow);。
希望这有帮助。
<强>更新
响应于请求即使在动态添加行之后仍然按顺序保存行的id的注释，我添加了SortRowIDs()函数，该函数在addNewRowAbove()和{{}}的末尾调用{1}}。
此函数抓取addNewRowBelow()中的所有<input type="checkbox"/>标记，然后使用jQuery的<table id="maintable"></table>方法迭代它们。然后，根据表中的顺序为每个复选框的父行分配一个Id。我还在代码中添加了一些注释，以便更容易理解。
.each()
答案 1 :(得分：1)
您可以使用insertBefore在按钮上方添加新行（将id="button"添加到行内容按钮）。尝试使用以下解决方案：
function addNewRowAbove(){
alert("actioned !!!");
var rowNumber=document.getElementById("rowIndex").value;
var rowNumberNew = parseInt(rowNumber)- 1 ;
alert(rowNumber+" - "+rowNumberNew);
var newRow = $('<tr/>').attr('id', 'row' + rowNumberNew);
newRow.html('<td><input type="checkbox" name="radio1" id="radio'+rowNumberNew+'"></input><input type="hidden" id="rowIndex'+rowNumberNew+'" value="'+rowNumberNew+'"/></td><td><input type="text" name="empid" id="empid'+rowNumberNew+'"></input></td><td><input type="text" name="empfname" id="empfname'+rowNumberNew+'"></input></td><td><input type="text" name="emplname" id="emplname'+rowNumberNew+'"></input></td>');
newRow.insertBefore('#button');
}
function addNewRowBelow(){
alert("actioned !!!");
var rowNumber=document.getElementById("rowIndex").value;
var rowNumberNew = parseInt(rowNumber) + 1 ;
alert(rowNumber+" - "+rowNumberNew);
var newRow = $('<tr/>').attr('id', 'row' + rowNumberNew);
newRow.html('<td><input type="checkbox" name="radio1" id="radio'+rowNumberNew+'"></input><input type="hidden" id="rowIndex'+rowNumberNew+'" value="'+rowNumberNew+'"/></td><td><input type="text" name="empid" id="empid'+rowNumberNew+'"></input></td><td><input type="text" name="empfname" id="empfname'+rowNumberNew+'"></input></td><td><input type="text" name="emplname" id="emplname'+rowNumberNew+'"></input></td>');
$('#maintable tbody').append(newRow);
}<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
</head>
<body>
<form>
<table id="maintable" width="50%" cellpadding="0" cellspacing="0" border="#729111 1px solid">
<tr>
<th align="center">Select</th>
<th align="center">Employee ID</th>
<th align="center">First Name</th>
<th align="center">Last Name</th>
</tr>
<tr><td><input type="checkbox" name="radio" id="radio"></input><input type="hidden" id="rowIndex" value="1"/></td>
<td><input type="text" name="empid"></input></td>
<td><input type="text" name="empfname"></input></td>
<td><input type="text" name="emplname"></input></td>
</tr>
<tr><td><input type="checkbox" name="radio1" id="radio1"></input><input type="hidden" id="rowIndex" value="2"/></td>
<td><input type="text" name="empid1"></input></td>
<td><input type="text" name="empfname1"></input></td>
<td><input type="text" name="emplname1"></input></td>
</tr>
<tr id="button"><td></td><td> <input type="submit" name="AddRowAbove" value="AddRowAbove" onclick="addNewRowAbove()"></td><td> <input type="submit" name="AddRowBelow" value="AddRowBelow" onclick="addNewRowBelow()"></td><td></td></tr>
</table>
</form>
</body>
</html>