大于选择器：
jQuery( ":gt(index)" )
jQuery( ":gt(-index)" )
例：大于TD5 到TD8 用黄色背景，TD8用红色文字。
<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset="utf-8">
<title>gt demo</title>
<style>
td{
color:blue;
font-weight:bold;
}
</style>
<script src="js/jquery-1.9.1.min.js"></script>
</head>
<body>
<table border="1">
<tr><td>TD #0</td><td>TD #1</td><td>TD #2</td></tr>
<tr><td>TD #3</td><td>TD #4</td><td>TD #5</td></tr>
<tr><td>TD #6</td><td>TD #7</td><td>TD #8</td></tr>
</table>
<script>
$("td:gt(4)").css("background-color","yellow");
$("td:gt(-2)").css("color","red");
</script>
</body>
</html>
