データベースの内容をページ上で異なる色で表示する方法

<br />
$style = array(0=>"red",1=>"yellow",2=>"gree");<br />
根据数据库的值 输出样式<br />

<br />
	$ar1=array(0,1,2);<br />
	$ar2=array(0,1,2);<br />
	$ar3=array(0,1,2);<br />
	$ar4=array(0,1,2);<br />
	$ar5=array(0,1,2);<br />
	$ar6=array(0,1,2);<br />
	$ar7=array(0,1,2);<br />
	<br />
<br />
<table border="1" cellspacing="0" cellpadding="0" width="600"><br />
	for($i=0;$i<count($ar1);$i++){<br />
		echo "<tr>";<br />
		echo "<td>".$ar1[$i]."</td>";<br />
		echo "<td>".$ar2[$i]."</td>";<br />
		echo "</tr>";<br />
	}<br />
</table><br />
<br />

<br />
<style type="text/css"><br />
.r{<br />
background-color:red;<br />
}<br />
.y{<br />
background-color:yellow;<br />
}<br />
.g{<br />
background-color:green;<br />
}<br />
</style><br />
<script src="http://code.jquery.com/jquery-latest.js"></script><br />
<script type="text/javascript"><br />
	$(function(){<br />
		$("#abv").click(function(){<br />
			$("tr td").each(function(){<br />
				if($(this).text()==0){<br />
					$(this).addClass("r");<br />
				}else if($(this).text()==1){<br />
					$(this).addClass("y");<br />
				}else{<br />
					$(this).addClass("g");<br />
				}<br />
			});<br />
		});<br />
	})<br />
 </script><br />
<input type="button" id="abv" value="测试用按钮"/><br />
<table border="1" cellspacing="0" cellpadding="0" width="600"><br />
 <tr><br />
	<td/>0</td><br />
	<td>2</td><br />
	<td>2</td><br />
	<td>1</td><br />
	<td>2</td><br />
	<td>2</td><br />
	<td>1</td><br />
 </tr><br />
 <tr><br />
	<td>2</td><br />
	<td>2</td><br />
	<td>1</td><br />
	<td/>1</td><br />
	<td>1</td><br />
	<td>2</td><br />
	<td>0</td><br />
 </tr><br />
 <tr><br />
	<td/>0</td><br />
	<td>1</td><br />
	<td>2</td><br />
	<td/>0</td><br />
	<td>1</td><br />
	<td>2</td><br />
	<td>0</td><br />
 </tr><br />
</table><br />
<br />

<style type="text/css"><br />
.col_0 {<br />
background-color:red;<br />
}<br />
.col_1 {<br />
background-color:yellow;<br />
}<br />
.col_2 {<br />
background-color:green;<br />
}<br />
</style>

while($row=mysql_fetch_array($result))<br />
{<br />
  echo '<tr>';<br />
  for($i=0; $i<7; $i++) {<br />
    echo "<td class='col_{$row[$i]}'>{$row[$i]}</td>";<br />
  }<br />
  echo '</tr>';<br />
}