我使用以下JavaScript创建了一个登录页面:
function handleLogin() {
var form = $("#loginForm");
//disable the button so we can't resubmit while we wait
//$("#submitButton",form).attr("disabled","disabled");
var e = $("#username", form).val();
var p = $("#password", form).val();
console.log("click");
if(e != "" && p != "") {
//var str = form.serialize();
//alert(str);
$.ajax({
type: 'POST',
url: 'http://localhost/php/log.php',
crossDomain: true,
data: {username: e, password :p},
dataType: 'json',
async: false,
success: function (response){
alert ("response");
if (response.success) {
alert("you're logged in");
window.localStorage["username"] = e;
window.localStorage["password"] = md5(p);
//window.localStorage["UID"] = data.uid;
window.location.replace("http://www.google.co.uk");
}
else {
alert("Your login failed");
//window.location("main.html");
}
},
error: function(error){
//alert(response.success);
alert('Could not connect to the database' + error);
window.location = "index.html";
}
});
}
else {
//if the username and password is empty
alert("You must enter username and password");
}
return false;
}
和log.php中的PHP是:
$link = mysql_connect("$host", "$username", "$password") or die("Could not connect to host.");
mysql_select_db("$db_name", $link) or die("Could not find database.");
$uname = isset($_POST['username']) ? $_POST['username'] : '';
$password = isset($_POST['password']) ? $_POST['password'] : '';
$sql = "SELECT * FROM user WHERE username = '$uname' AND password = '$password'";
$result=mysql_query($sql);
$num_row=mysql_num_rows($result);
$row=mysql_fetch_array($result);
if (is_object($result) && $result->num_rows == 1) {
$response['success'] = true;
}
else
{
$response['success'] = false;
}
echo json_encode($response);
//echo 'OK';
如果组合错误,我希望页面显示一些错误,或者如果它是正确的,则重定向到另一个页面。但是它只是用url中的用户名/密码刷新。
登录表单
<form id="loginForm" method="post">
<div data-role="fieldcontain" class="ui-hide-label">
<label for="username">Username:</label>
<input type="text" name="username" id="username" value="" placeholder="Username" />
</div>
<div data-role="fieldcontain" class="ui-hide-label">
<label for="password">Password:</label>
<input type="password" name="password" id="password" value="" placeholder="Password" />
</div>
<input type="submit" value="Login" id="submitButton">
</form>
答案 0 :(得分:0)
请按以下方式更改您的html容器
<div data-role="fieldcontain" class="ui-hide-label">
<label for="username">Username:</label>
<input type="text" name="username" id="username" value="" placeholder="Username" />
</div>
<div data-role="fieldcontain" class="ui-hide-label">
<label for="password">Password:</label>
<input type="password" name="password" id="password" value="" placeholder="Password" />
</div>
<input type="button" value="Login" id="submitButton" onclick="handleLogin()">
因为您使用ajax提交数据,所以您不需要写#34;形式&#34;你的HTML中的标签
单击&#34;提交&#34;将刷新总页数。按钮。所以我改成了&#34;按钮&#34;并在&#34; onclick&#34;中提供ajax方法。属性
示例PHP文件(index.php),我试过没有连接数据库来测试你的场景
<?php
if($_POST){
if($_POST['username'] == "admin" && $_POST['password'] == "admin"){
$response['success'] = true;
}else{
$response['success'] = false;
}
echo json_encode($response);
exit;
}
?>
修改你的js代码
function handleLogin() {
var e = $("#username").val();
var p = $("#password").val();
if(e != "" && p != "") {
$.ajax({
type: 'POST',
url: 'index.php',
crossDomain: true,
data: {username: e, password :p},
dataType: 'json',
async: false,
success: function (response){
alert ("response");
if (response.success) {
alert("you're logged in");
}
else {
alert("Your login failed");
}
},
error: function(error){
alert('Could not connect to the database' + error);
}
});
}
else {
alert("You must enter username and password");
}
return false;
}
答案 1 :(得分:0)
由于您正在使用jQuery(版本1.10.1),因此您可以将click事件直接绑定到表单提交按钮
$(document).on('click', '#submitButton', function(e) {
e.preventDefault();
... See detailed jsFiddle example ...
return false;
});
使用preventDefault()
,您可以删除“提交”按钮的默认提交行为,因此在表单提交后不会重新加载页面。
还可以使用action等表单属性来提供ajax URL或方法来设置ajax请求类型。
P.S 这种类型的绑定对jQuery 1.6不起作用
答案 2 :(得分:0)
试试这个:if(response.responseText)