更新
感谢 charlietfl的评论和建议（并且，在某一点上，lol - 为我的失礼道歉），我终于从Validate中检查了系统，表单提交是发送电子邮件时暂停。所以我想我的问题已经回答了，但是如果你再一次忍受我的话，最后一点点就是我可以用你的帮助......
在我最初的愿景中，除了触发正确的“电子邮件已存在”错误之外，我还填充了第二个元素，其中包含一些HTML，可以更完整地向用户解释情况并提供登录表单的链接。第二个元素出现并消失，取决于该领域的状态。
有没有办法使用messages / remote部分来执行此操作？
我在这里：
$(document).ready(function(){
$("#signup").validate({
errorElement: "span",
errorPlacement: function(error, element) {
error.appendTo(element.prev());
//element.prev().replaceWith(error);
},
rules: {
"email": {
required: true,
email:true,
remote: {
url: "/ajax/emailcheck.php",
type: "post",
},
},
"password": {
required: true,
minlength: 8,
},
"password-check": {
required: true,
minlength: 8,
passmatch: true,
},
"tos": {
required: true,
minlength: 6,
}
},
messages: {
email: {
required: " is Required",
email: " is Improperly Formatted",
remote: " already exists",
},
},
password: {
required: " is Required",
minlength: " requires at least 8 characters",
},
"password-check": {
required: " is Required",
minlength: " requires at least 8 characters",
passmatch: " must match the Passphrase",
},
tos: {
required: " is Required",
minlength: " requires at least 6 characters",
},
},
onkeyup: true,
onblur: true
});
而且，在理想中，我会喜欢这样的事情：
messages: {
email: {
required: " is Required",
email: " is Improperly Formatted",
remote: " already exists",
remote: {
username: function() {
var emailcheck = $('#email').val();
return $('#username_availability_result').html(emailcheck + ' is already in our system. Please <a href="/login.php">log in here</a>.');
},
},
},
},
再次感谢，并提前，感谢您持续的关注和建议，
ž
原始问题
我正在使用jQuery Validate在注册表单上运行例行验证。但是我想要添加到表单功能中的一个功能是进行AJAX检查以确定系统中是否已有电子邮件地址。问题是电子邮件检查功能存在于验证功能的外部，因此实际上并不会在必要时阻止表单提交。
这是我的代码。 （前50行包括验证和密码匹配。其余部分构成AJAX检查[由电子邮件字段的keyup事件触发]。
// Method adds password matching abilities to the validator
jQuery.validator.addMethod("passmatch", function(value, element) {
return $('#password').val() == $('#password-check').val()
}, "* Passwords should match");
$(document).ready(function(){
$("#signup").validate({
errorElement: "span",
errorPlacement: function(error, element) {
error.appendTo(element.prev());
//element.prev().replaceWith(error);
},
rules: {
"email": {
required: true,
email:true,
},
"password": {
required: true,
minlength: 8,
},
"password-check": {
required: true,
minlength: 8,
passmatch: true,
},
"tos": {
required: true,
minlength: 6,
}
},
messages: {
email: {
required: " is Required",
email: " is Improperly Formatted",
},
password: {
required: " is Required",
minlength: " requires at least 8 characters",
},
"password-check": {
required: " is Required",
minlength: " requires at least 8 characters",
passmatch: " must match the Password"
},
tos: {
required: " is Required",
minlength: " requires at least 6 characters",
},
}
});
//check email availability
$('#email').keyup(function(){
check_availability();
});
});
//function to check username availability
function check_availability(){
//get the username
var username = $('#email').val();
//use ajax to run the check
$.post("/ajax/emailcheck.php", { username: username },
function(result){
//if the result greater than none
if(result > 0 ){
//show that the username is not available
$('#username_availability_result').html(username + ' is already in our system. Please <a href="/login.php">log in here</a>.');
}else{
//username available.
//clear any messages
$('#username_availability_result').html('');
}
});
}
check_availability（）函数是否有办法触发停止（并在清除后启动），以便在错误状态期间无法提交表单？或者可以使用addMethod将整个工具包和caboodle集成到Validate中（如果是这样，请注意我在特定的IDed元素中提供可用性反馈，而不是通过出现其他Validate错误的相同元素）？
提前感谢您的所有帮助和建议。
ž
答案 0 :(得分：2)
使用已经具有内置ajax方法的验证插件的远程选项，该方法将绑定到输入
http://docs.jquery.com/Plugins/Validation/Methods/remote#options
或者required也可以是一个函数（不适用于keyup或blur）
email:{ required: function(){
return $('#username_availability_result').html()=='';
}
}
另外，如果ajax返回重复，为什么不重置电子邮件字段？您的代码可能会像重置字段一样工作
最好的建议是内置remote
答案 1 :(得分：0)
<script language="javascript" type="text/javascript">
$(document).ready(function() {
$("#singupfrom").validate({
rules: {
'useremail': {// compound rule
required: true,
email: true,
remote:{
url: "check_email.php",
type: "post",
data:
{
emails: function()
{
return $('#singupfrom :input[name="useremail"]').val();
}
}
}
}
},
// here custom message for email already exists
messages: {
useremail: { remote: "Email already exists"}
}
});
});
</script>
<!-- your user email-->
<label>Email :</label>
<input type="text" name="useremail" id="useremail" value="" />
<!-- your user email end -->
// your php file "check_email.php" will be some thing like it
/// get or post can also be used in place of request depending on situation
$email = $_REQUEST['useremail'];
<?php
$check = "your query to check the email and returns the no of rows/ emails exists ";
if ($check == '0' or empty($check)) {
echo 'true';
} else {
echo 'false';
}
?>