<body>
<h1>注册</h1>
<div><input type="text" id="user" /><div></div></div>
</body>
<script type="text/javascript">
$(document).ready(function(e){
//判断用户名是否可用
$("#user").blur(function(){
var uid = $(this).val();
$.ajax({
url:"chuli.php",
data:{u:uid,type:1},
type:"POST",
datatype:"TEST"
success:function(d){
if(d=="OK"){$("$ts").html("用户名可用");}else{$("#ts").html("<span style=‘color=red‘>该用户名已经存在</span>");}
}
});
})
});
</script>
chuli.php
<?php //不要有空 顶到头写
$type=$_POST["type"];
include "DBDA.php";
$db = new DBDA();
switch()
{
case 0:
$uid = $_POST["u"]; //接收
$pwd = $_POST["p"];
$sql = "select count(*) from login where username=‘{$uid}‘ and password=‘{$pwd}‘";
$attr = $db->Query($sql);
if($attr[0][0]==0)
{
echo "用户名密码不正确";
}
else
{
echo "OK";
}
break;
case 1:
$uid = $_POST["u"];
$sql = "select count(*) from login where username=‘{$uid}‘";
$attr = $db->Query($sql);
if($attr[0][0]==0)
{
echo "OK";
}
else
{
echo "NO";
}
break;
｝
时间： 2024-08-28 12:56:20