数据库：
前台页面：choseForm.php
<html>
<head>
<script type="text/javascript">
function showUser(str){
var xmlhttp;
if (str=="")
{
document.getElementById("txtHint").innerHTML="";
return;
}
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","getuser.php?q="+str,true);
xmlhttp.send();
}
</script>
</head>
<body>
<form>
Select a User:
<select name="users" onchange="showUser(this.value)">
<option value="0">Please Choose</option>
<option value="1">Peter Griffin</option>
<option value="2">Lois Griffin</option>
<option value="3">Glenn Quagmire</option>
<option value="4">Joseph Swanson</option>
</select>
</form>
<div id="txtHint">客户信息将在此处列出 ...</div>
</body>
</html>
后台文件：getuser.php
<?php
$q=$_GET["q"];
$mysql_server_name="localhost"; //数据库服务器名称
$mysql_username="root"; // 连接数据库用户名
$mysql_password="cxst789"; // 连接数据库密码
$mysql_database="user"; // 数据库的名字
// 连接到数据库
$con=mysql_connect($mysql_server_name, $mysql_username,
$mysql_password);
if (!$con)
{
die(‘Could not connect: ‘ . mysql_error());
}
mysql_select_db("user", $con);
$sql="SELECT * FROM user WHERE id = ‘".$q."‘";
$result = mysql_query($sql);
echo "<table border=‘1‘>
<tr>
<th>Firstname</th>
<th>Lastname</th>
<th>Age</th>
<th>Hometown</th>
<th>Job</th>
</tr>";
while($row = mysql_fetch_array($result))
{
echo "<tr>";
echo "<td>" . $row[‘FirstName‘] . "</td>";
echo "<td>" . $row[‘LastName‘] . "</td>";
echo "<td>" . $row[‘Age‘] . "</td>";
echo "<td>" . $row[‘Hometown‘] . "</td>";
echo "<td>" . $row[‘Job‘] . "</td>";
echo "</tr>";
}
echo "</table>";
mysql_close($con);
?>