<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
<script src="Scripts/jquery-1.7.1.js"></script>
<script type="text/javascript">
$(function () {
$("#tab td").mouseover(function () {
$(this).text('★').prevAll('td').end().nextAll('td').text('★');
}).mouseout(function () {
$('#tab td').text('☆');
$('#tad td[isClicked=true]').text('★').prevAll('td').text('★');
}).click(function()
{
$('tab td').attr('isClicked', true).siblings('td').removeAttr('isClicked');
});
});
</script>
</head>
<body>
<table id="tab">
<tr><td>☆</td><td>☆</td><td>☆</td><td>☆</td></tr>
</table>
</body>
</html>