ajax乱码问题（仿百度搜索页面），在线求解答，大侠们有空速度帮忙
这种乱码如何解决！！！我代码都贴出来：
<?php<br>
//require('common.inc.php');<br>
//require('config.inc.php');<br>
mysql_connect('localhost', 'root' ,'123456');<br>
mysql_select_db("hxyjw_20100416");<br>
mysql_query("SET NAMES GBK");//防止数据库交互时乱码<br>
header('Content-Type:text/html;charset=gbk');<br>
<br>
$queryString = $_POST['queryString'] ;<br>
<br>
if(strlen($queryString) >0) {<br>
$sql= "SELECT username FROM phpcms_member WHERE username LIKE '".$queryString."%' LIMIT 0,15";<br>
echo $sql;<br>
$query = mysql_query($sql);<br>
while ($result = mysql_fetch_array($query))<br>
{<br>
$value=$result['username'];<br>
echo '<li onClick="fill(\''.$value.'\');">'.$value.'</li>';<br>
}<br>
<br>
}<br>
?><br>
htm:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><br>
<html xmlns="http://www.w3.org/1999/xhtml"><br>
<head><br>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"/><br>
<title>Ajax搜索功能</title><br>
<script type="text/javascript" src="/js/jquery-1.3.1.js"></script><br>
<script type="text/javascript"><br>
function lookup(inputString) {<br>
if(inputString.length == 0) {<br>
// Hide the suggestion box.<br>
$('#suggestions').hide();<br>
} else {<br>
$.post("rpc.php", {queryString: ""+inputString+""}, function(data){<br>
if(data.length >0) {<br>
$('#suggestions').show();<br>
$('#autoSuggestionsList').html(data);<br>
}<br>
});<br>
}<br>
} // lookup<br>
function fill(thisValue) {<br>
$('#inputString').val(thisValue);<br>
setTimeout("$('#suggestions').hide();", 200);<br>
}<br>
</script><br>
<style type="text/css"><br>
body {<br>
font-family: Helvetica;<br>
font-size: 11px;<br>
color: #000;<br>
}<br>
h3 {<br>
margin: 0px;<br>
padding: 0px;<br>
}<br>
.suggestionsBox {<br>
position: relative;<br>
left: 30px;<br>
margin: 10px 0px 0px 0px;<br>
width: 200px;<br>
background-color: #212412427;<br>
-moz-border-radius: 7px;<br>
-webkit-border-radius: 7px;<br>
border: 2px solid #000;<br>
color: #fff;<br>
}<br>
.suggestionList {<br>
margin: 0px;<br>
padding: 0px;<br>
}<br>
.suggestionList li {<br>
margin: 0px 0px 3px 0px;<br>
padding: 3px;<br>
cursor: pointer; <div class="clear">
</div>
