JQuery.validate.js 在表单验证中经常使用，初学，对于其中Remote的使用说明一下.
1. 基本解释
JQuery主要用于DOM树和CSS树的检索和后面的操作的一套方法，JQuery.validate.js是对JQuery的一个插件，可以认为是对JQuery在某个特殊场景下的扩展，而Validate就是对表单验证提供的扩展。
2. 场景解释
用户进行注册用户的时候，要异步的判断用户名是否存在，给出提示信息。
3. 通过案例学习
Html和JavaScript结合的脚本.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"> <head>
<script src="../includes/libraries/javascript/jquery.js" type="text/javascript" charset="utf-8" ></script>
<script src="../includes/libraries/javascript/jquery.plugins/jquery.validate.js" type="text/javascript" charset="utf-8"></script> <script type="text/javascript">
$().ready(function() {
$("#signupForm").validate({ debug: false,
onkeyup:false,
/*忽略某些元素不做验证*/
//ignore: ".ignore", /* 更改错误信息显示的位置
Default:
errorPlacement: function(error, element) {
error.appendTo(element.parent());
}
error.appendTo(element.parent());
*/
/*
submitHandle: function(form){
alert("submited!");
form.submit();},
*/
rules: {
/*
firstname: {
required: function(){ return true;}},
*/ firstname: {
required: true,
remote: {
url: "Learn.php",
type: "post",
//DataType: "json",
data: {
firstname: function(){
return $("#firstname").val();
}
}}}, phonenum: {
required: true,
digits: true,
rangelength: [11,11]}, email: {
required: true,
email: true}, password: {
required: true,
minlength: 5}, confirm_password: {
required: true,
minlength: 5,
equalTo: "#password"}
}, messages: {
firstname: {
required: "请输入姓名",
remote: "请输入姓名，remote"}, phonenum: {
required: "请输入手机号",
digits: "存在字符，非法手机号",
rangelength: "手机号位数不对"}, email: {
required: "请输入Email地址",
email: "请输入正确的email地址"}, password: {
required: "请输入密码",
minlength: jQuery.format("密码不能小于{0}个字 符")}, confirm_password: {
required: "请输入确认密码",
minlength: "确认密码不能小于5个字符",
equalTo: "两次输入密码不一致不一致"}
}, submitHandler: function(form){
alert("验证通过");} });
});
</script> </head> <body> <form id="signupForm" method="post" action="">
<p>
<label for="firstname">姓氏</label>
<input id="firstname" name="firstname" />
</p> <p>
<label for="phonenum">手机</label>
<input id="phonenum" name="phonenum" />
</p> <p>
<label for="email">邮件</label>
<input id="email" name="email" />
</p> <p>
<label for="password">密码</label>
<input id="password" name="password" type="password" />
</p> <p>
<label for="confirm_password">确认密码</label>
<input id="confirm_password" name="confirm_password" type="password" />
</p> <p>
<input class="submit" type="submit" value="提交"/>
</p> </form>
</body>
</html>
后台PHP代码 BaseFunction.php
<?php
function WriteLog($msg)
{
$filename = dirname(__FILE__) ."\\Debug.log";
$handler = null;
if (($handler = fopen($filename, 'ab+')) !== false)
{
fwrite($handler, "\n".'['.date('Y-m-d H:i:s').']'."\t".$msg);
fclose($handler);
}
}
function CheckUser($UserName) {
if( $_REQUEST[$UserName] == 'php' ){
exit("false");
}
else{
exit("true");
}
}
?>
后台PHP代码 Learn.php
<?php
require("BaseFunction.php");
CheckUser('firstname');
?>