[Sigizmund2012]

Во, набыдлокодил:

<form id="brigade" action="/" method="get">
	<table id="members">
		<tr class="name">
			<td>Вася</td>
			<td>
			<input type="checkbox" name="member" value="vasya">
			</td>
		</tr>
		<tr class="name">
			<td>Петя</td>
			<td>
			<input type="checkbox" name="member" value="petya">
			</td>
		</tr>
		<tr class="name">
			<td>Боря</td>
			<td>
			<input type="checkbox" name="member" value="borya">
			</td>
		</tr>
		<tr class="name">
			<td>Равшан</td>
			<td>
			<input type="checkbox" name="member" value="ravshan">
			</td>
		</tr>
	</table>
	<table id="colors">
		<tr class="color">
			<td>Жёлтый</td>
			<td>
				<input type="radio" name="color" value="yellow">
			</td>
		</tr>
		<tr class="color">
			<td>Синий</td>
			<td>
				<input type="radio" name="color" value="blue">
			</td>
		</tr>
		<tr class="color">
			<td>Зелёный</td>
			<td>
				<input type="radio" name="color" value="green">
			</td>
		</tr>
		<tr class="color">
			<td>Серый</td>
			<td>
				<input type="radio" name="color" value="gray">
			</td>
		</tr>
	</table>
	<input type="text" name="choosencolor" value="">
	<input type="submit" value="Выделить" id="submit">
</form>
<script type="text/javascript">

var button = document.getElementById('submit');

var checkboxes = document.getElementsByName('member');

var radios = document.getElementsByName('color');

var choosencolor = document.getElementsByName('choosencolor')[0];

for (var i = 0; i < radios.length; i++) {
	radios[i].onchange = function(e){
		choosencolor.value = this.value;
	}
}

button.onclick = confirm;

function confirm(event){
	event.preventDefault();
	for (var i = 0; i < checkboxes.length; i++) {
		if(checkboxes[i].checked){
			checkboxes[i].parentNode.parentNode.setAttribute('style', 'background:'+ choosencolor.value + ';');
		}
	}
}

</script>