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Implement smart form validation operations based on jquery_jquery

WBOY
WBOYOriginal
2016-05-16 09:00:311937browse

the registration modules of many websites can instantly check whether the format is correct, which greatly enhances the user experience and is very beneficial to development.
let me first show you the form renderings. the specific effects are as follows:

1. the front desk is initially implemented with jquery. first, let’s add html tags:

<body>
<form id="form1" runat="server">
<table class="tble">
<tr><td class="td1">用户名 <input type="text" class="td" /></td></tr>
<tr><td class="td2">密码 <input type="text" class="td"/></td></tr>
<tr><td class="td3">邮箱 <input type="text" class="td" /></td></tr>
<tr><td class="td4">确认密码 <input type="text" class="td" /></td></tr>
<tr><td><input class="btton1" type="button" value="提交" /></td><td><input class="btton2" type="reset" value="重置" /></td></tr>
</table>
</form>
</body>

2, is the css code:

<style type="text/css">
.tble
{
font-size:14px;
text-align:right;
position:absolute;
left:550px;
top:150px;
}
.td
{
border:2px #cccccc solid;
}
.btton1
{
position:absolute;
left:65px;
}
.btton2
{
position:absolute;
left:110px;
}
.span
{
color:#cccccc;
font-size:14px;
text-align:right;
}
.spanpwd2
{
color:red;
}
.spanpwd3
{
color:red;
}
.spanpwd4
{
color:red;
}
.spanpwd5
{
color:green;
}
.spanpwd6
{
color:red;
}
</style>

3. before writing jquery code, you need to introduce jquery support files:

4. now start writing jquery code:

<script type="text/javascript">
$(function () {
GetStyle();
GetPassword();
GetEmail();
function GetStyle() {
$("input.td").focus(function () {
//===================密码样式处理===================================
$(this).css("border", "2px #00ccff solid");
var span = "<td class='span'><span>请输入密码</span></td>";
$(this).parent().parent().find("td.td2").after(span);
$(this).parent().parent().find("td.spanPwd2").remove();
$(this).parent().parent().find("td.spanPwd3").remove();
$(this).parent().parent().find("td.spanPwd4").remove();
$(this).parent().parent().find("td.spanPwd5").remove();
//==================================================================
//================邮箱样式处理==============================
$(this).css("border", "2px #00ccff solid");
var spanEmail = "<td class='span'><span>请输入正确邮箱地址</span></td>";
$(this).parent().parent().find("td.td3").after(spanEmail);
$(this).parent().parent().find("td.spanPwd6").remove();
$(this).parent().parent().find("td.spanPwd5").remove();
//===================用户名样式处理========================
$(this).css("border", "2px #00ccff solid");
var spanEmail = "<td class='span'><span>请输入正确用户名</span></td>";
$(this).parent().parent().find("td.td1").after(spanEmail);
$(this).parent().parent().find("td.spanPwd6").remove();
$(this).parent().parent().find("td.spanPwd5").remove();
})
}
//================确认密码的验证================================
//非空验证
//确认密码与原密码一致性的验证
function GetPassword() {
$("input.td").blur(function () {
//================密码验证=================================
//非空验证
if ($(this).val() == "") {
$(this).css("border", "2px red solid");
$(this).parent().parent().find("td.span").remove();
var span = "<td class='spanPwd2'><span>密码不能为空!</span></td>";
$(this).parent().parent().find("td.td2").after(span);
return false;
}
//密码长度的验证
else if ($(this).val().length < 6 || $(this).val().length > 12) {
$(this).css("border", "2px red solid");
$(this).parent().parent().find("td.span").remove();
var span = "<td class='spanPwd3'><span>密码长度必须为6位到12位之间!</span></td>";
$(this).parent().parent().find("td.td2").after(span);
return false;
}
//如果密码不为数字
else if (isNaN($(this).val()) == true) {
$(this).css("border", "2px red solid");
$(this).parent().parent().find("td.span").remove();
var span = "<td class='spanPwd4'><span>密码必须为数字!</span></td>";
$(this).parent().parent().find("td.td2").after(span);
return false;
}
else {
//密码格式通过
$(this).css("border", "2px #cccccc solid");
$(this).parent().parent().find("td.span").remove();
var span = "<td class='spanPwd5'><span>密码格式通过!</span></td>";
$(this).parent().parent().find("td.td2").after(span);
return true;
}
});
}
//=====================邮箱验证开始========================
function GetEmail() {
$(".td3 input").blur(function () {
var patten = new RegExp(/^[w-]+(.[w-]+)*@([w-]+.)+[a-zA-Z]+$/);
//非空验证
if ($(".td3 input").val() == "") {
$(this).css("border", "2px red solid");
$(this).parent().parent().find("td.span").remove();
var spanxEmail = "<td class='spanPwd6'><span>邮箱不能为空!</span></td>";
$(this).parent().parent().find("td.td3").after(spanxEmail);
return false;
}
//邮箱格式验证
else if (patten.test($(".td3 input").val()) == false) {
$(this).css("border", "2px red solid");
$(this).parent().parent().find("td.span").remove();
var span = "<td class='spanPwd4'><span>邮箱格式不正确，请重新填写 !</span></td>";
$(this).parent().parent().find("td.td3").after(span);
return false;
} else {
//邮箱格式通过
$(this).css("border", "2px #cccccc solid");
$(this).parent().parent().find("td.span").remove();
var spanEmail = "<td class='spanPwd5'><span>邮箱格式通过!</span></td>";
$(this).parent().parent().find("td.td3").after(spanEmail);
return true;
}
});
}
//==========================邮箱验证结束============================
//================用户名验证=================================
function GetUserName() {
$(".td1 input").blur(function () {
//非空验证
if ($(this).val == "") {
$(this).css("border", "2px red solid");
$(this).parent().parent().find("td.span").remove();
var span = "<td class='spanPwd6'><span>用户名邮箱不能为空!</span></td>";
$(this).parent().parent().find("td.td1").after(span);
return false;
}
//用户名长度的验证 
else if ($(this).length < 4 || $(this).length > 20) {
$(this).css("border", "2px red solid");
$(this).parent().parent().find("td.span").remove();
var spanxEmail = "<td class='spanPwd6'><span>用户名格式不对，只能输入4-20字符!</span></td>";
$(this).parent().parent().find("td.td1").after(spanxEmail);
return false;
}
//用户名格式验证通过
else {
$(this).css("border", "2px #cccccc solid");
$(this).parent().parent().find("td.span").remove();
var spanUserName = "<td class='spanPwd5'><span>用户名格式通过!</span></td>";
$(this).parent().parent().find("td.td3").after(spanUserName);
return true;
}
});
}
//========================点击按钮与服务器互交验证==============
$("tr td input.btton1").click(function () {
if (GetUserName() && GetEmail() && GetPassword()) {
var userName = $("td.td1 input").val(); //用户名 
var userPwd = $("td.td2 input").val(); //密码
var userRepass = $("td.td3 input").val(); //确认密码
var email = $("td.td4 input").val(); //邮箱 
GetAjax(userName, userPwd, userRepass, email);
}
});
function GetAjax(userName, userPwd, userRepass, email) {
var json = [{ "userName": userName, "userPwd": userPwd, "userRepass": userRepass, "email": email}];
$.post("ProcessResult.aspx?jon=" + json, function (data) {
if (data == "false") {
alert("用户名重复了，请重新输入!");
} else if (data == "ok") {
alert("注册成功!");
} else {
alert("对不起，你的输入有误,请检查输入");
}
})
}
});
</script>

5achieve the following effects:

i did not implement the background jquery verification. i will make up for it next time when i have the opportunity. i will write it here this time and only achieve the pure front-end effect.
this is where i introduce you to the relevant knowledge about using jquery to implement smart form validation functions. i hope it will be helpful to you!

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