要验证检查点,如果
,表单将必须显示警报最后,重置按钮会将所有输入重置为空:
//Variable declaration
var username=document.forms["Registration"]["name"];
var e_mail=document.forms["Registration"]["email"];
var password=document.forms["Registration"]["psw1"];
var passwordcheck=document.forms["Registration"]["psw2"];
//add eventListener
username.addEventListener("blur", NameVerify, true);
e_mail.addEventListener("blur", EmailVerify, true);
password.addEventListener("blur", PasswordVerify, true);
passwordcheck.addEventListener("blur", PasswordVerify, true);
// validate the registration
function Validate(){
if (username.value=="")
{
alert("username is required");
username.focus()
return false;
}
if (e_mail.value=="")
{
alert("Email is required");
e_mail.focus()
return false;
}
if (password.value=="")
{
alert("Password is required");
password.focus()
return false;
}
if (passwordcheck.value=="")
{
alert("Re-enter your password");
passwordcheck.focus()
return false;
}
if(password.value != passwordcheck.value){
alert("Password do not match!!")
passwordcheck.focus()
return false;
}
}
//check the username value
function NameVerify(username){
if (username.value !=0) {
document.querySelector.backgroundColor = lightGrey;
return true;
}
}
//check the e_mail
function EmailVerify(e_mail){
if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.`\w{2,3})+$/.test(Registration.email.value))`
{
return (true)
}
alert("You have entered an invalid email address!")
e_mail.focus()
return (false)
}
//check the password
function PasswordVerify(password){
var psw = /^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[^a-zA-Z0-9])(?!.*\s).{8,20}$/;
if(password.value.match(psw))
{
alert('Correct, try another...')
return true;
}
else
{
alert('Wrong!!')
return false;
}
}
// clear all text inputs when the page is loaded
function clearInp() {
document.getElementsByTagName("input").value = "";
return true;
}
//reset all text fields
function Reset() {
document.querySelector("#Registration").reset();
return true;
}
答案 0 :(得分:1)
所有这些都不需要任何JavaScript。
<input type="text" required />
<input type="password" minlength="8" />
<input type="email" />
<input type="password" pattern="(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9]).{8,}" />
<input type="reset" value="Reset form" />
一旦您从表单中删除了所有JavaScript代码,您将发现您的表单不再有任何JavaScript错误;)