JSFiddle - React, Tailwind, and code Playground

HTML

<table id="key_table" border="3">
	<thead>
		<tr>
			<th>
				Month 1<button id="1" class="lockButton">Lock</button><br>2013-01-01 to 2013-01-31<br>
				<table style="width: 250px;">
					<tbody>
						<tr class="odd">
							<td style="text-align:center;">1</td>
							<td style="text-align:center;">2</td>
							<td style="text-align:center;">3</td>
							<td style="text-align:center;">4</td>
						</tr>
					</tbody>
				</table>
			</th>
			<th>
				Month 2 <button id="2" class="lockButton">Lock</button><br>2013-02-01 to 2013-02-28<br>
				<table style="width: 250px;">
					<tbody>
						<tr class="odd">
							<td style="text-align:center;">1</td>
							<td style="text-align:center;">2</td>
							<td style="text-align:center;">3</td>
							<td style="text-align:center;">4</td>
						</tr>
					</tbody>
				</table>
			</th>
		</tr>
	</thead>
	<tbody>
		<tr class="odd">
			<td style="width: 250px;">
				<table>
					<tbody>
						<tr class="odd">
							<td style="text-align:center;width:100px !important;"><input style="width: 15px !important;" class="kw_460853mo_1" type="checkbox"></td>
							<td style="text-align:center;width:100px !important;"><input style="width: 15px !important;" class="kw_460853mo_1" type="checkbox"></td>
							<td style="text-align:center;width:100px !important;"><input checked="checked" style="width: 15px !important;" class="kw_460853mo_1" type="checkbox"></td>
							<td style="text-align:center;width:100px !important;"><input style="width: 15px !important;" class="kw_460853mo_1" type="checkbox"></td>
						</tr>
					</tbody>
				</table>
			</td>
			<td style="width: 250px;">
				<table>
					<tbody>
						<tr class="odd">
							<td style="text-align:center;width:100px !important;"><input style="width: 15px !important;" class="kw_460853mo_2" type="checkbox"></td>
							<td style="text-align:center;width:100px !important;"><input style="width: 15px !important;" class="kw_460853mo_2" type="checkbox"></td>
							<td...

JavaScript

$('.lockButton').on('click', function() {
    $('#key_table > tbody > tr').find('input[type="checkbox"][class$="'+this.id+'"]').prop('disabled', true);
});