答案 0 :(得分：0)
工作示例：https://jsfiddle.net/Twisty/1c98Ladh/3/
一些小的HTML更改：
<form action="assets.php" method="post">
<button type="button" id="add">Add Row</button>
<button type="button" id="delete">Remove Row</button>
<table id="myassettable">
<tbody>
<tr>
<th>Asset Type</th>
<th>Manufacturer</th>
<th>Serial #</th>
<th>MAC Address</th>
<th>Description</th>
<th>Site</th>
<th>Location</th>
</tr>
<tr class="removable">
<td>
<select name="asset[0][type]">
<option>---</option>
<option>Type Option</option>
</select>
</td>
<td>
<select class="manuf_name" name="asset[0][manuf]">
<option>---</option>
<option>
Manuf Option
</option>
</select>
</td>
<td>
<input type="text" placeholder="Serial #" name="asset[0][serial_num]">
</td>
<td>
<input type="text" placeholder="Mac Address" name="asset[0][mac_address]">
</td>
<td>
<input type="text" placeholder="Name or Description" name="asset[0][description]">
</td>
<td>
<select id="site-0" class="chooseSite" name="asset[0][site]">
<option>---</option>
<option>
Site Option
</option>
</select>
</td>
<td>
<input type="text" placeholder="e.g Level 3 Utility Room" name="asset[0][location]">
</td>
<td>
<select id="new-site-0" name="asset[0][contact]">
</select>
</td>
</tr>
</tbody>
</table>
<input type="submit" value="Submit">
<input type="hidden" name="submitted" value="TRUE" />
</form>
这使我们在添加新元素时准备增加id。利用class，我们可以将.change()绑定到每个{。}}。
$(document).ready(function() {
$("#add").click(function() {
var newgroup = $('#myassettable tbody>tr:last');
newgroup
.clone(true)
.find("input").val("").end()
.insertAfter('#myassettable tbody>tr:last')
.find(':input')
.each(function() {
this.name = this.name.replace(/\[(\d+)\]/,
function(str, p1) {
return '[' + (parseInt(p1, 10) + 1) + ']';
});
});
var lastId = parseInt(newgroup.find(".chooseSite").attr("id").substring(5), 10);
newId = lastId + 1;
$("#myassettable tbody>tr:last .chooseSite").attr("id", "site-" + newId);
$("#myassettable tbody>tr:last select[id='new-site-" + lastId + "']").attr("id", "new-site-" + newId);
return false;
});
$("#delete").click(function() {
var $last = $('#myassettable tbody').find('tr:last');
if ($last.is(':nth-child(2)')) {
alert('This is the only one');
} else {
$last.remove();
}
});
$(".chooseSite").change(function(event) {
console.log($(this).attr("id") + " changed to " + $(this).val());
var target = "new-" + $(this).attr('id');
/*$.ajax({
type: 'post',
url: 'assetprocess.php',
data: {
get_option: $(this).val()
},
success: function(response) {
$("#" + target).html(response);
}
});*/
var response = "<option>New</option>";
$("#" + target).html(response);
});
});
可以通过在全局空间中为行数设置计数器来节省一些时间，例如var trCount = 1;，并使用它来设置数组索引和ID。克隆是快速而简单的，但它也意味着我们必须返回并附加各种属性。还可以创建一个为您绘制HTML的功能。喜欢：https://jsfiddle.net/Twisty/1c98Ladh/10/
function cloneRow(n) {
if (n - 1 < 0) return false;
var html = "";
html += "<tr class='removable' data-row=" + n + ">";
html += "<td><select name='asset[" + n + "][type]' id='type-" + n + "'>";
html += $("#type-" + (n - 1)).html();
html += "<select></td>";
html += "<td><select name='asset[" + n + "][manuf]' id='manuf-" + n + "'>";
html += $("#manuf-" + (n - 1)).html();
html += "<select></td>";
html += "<td><input type='text' placeholder='Serial #' name='asset[" + n + "][serial_num]' id='serial-" + n + "' /></td>";
html += "<td><input type='text' placeholder='MAC Address' name='asset[" + n + "][mac_address]' id='mac-" + n + "' /></td>";
html += "<td><input type='text' placeholder='Name or Desc.' name='asset[" + n + "][description]' id='desc-" + n + "' /></td>";
html += "<td><select name='asset[" + n + "][site]' class='chooseSite' id='site-" + n + "'>";
html += $("#site-" + (n - 1)).html();
html += "<select></td>";
html += "<td><input type='text' placeholder='E.G. Level 3 Utility Room' name='asset[" + n + "][location]' id='loc-" + n + "' /></td>";
html += "<td><select name='asset[" + n + "][contact]' id='contact-" + n + "'><select></td>";
html += "</tr>";
return html;
}
预先更多的工作，但每个部分提供更多的控制。以后更容易使用。