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我想在提交它之前验证我的表单，但是表单正在提交，无论如何没有任何提醒，即使表单提交空白。当点击提交按钮时，我想确保信息已经完成并且是正确的，并且当它是空白或不正确的时候，应该在不提交表单的情况下发出提醒。Javascript表单验证没有提交提醒
感谢
HTML
<!DOCTYPE html>
<html>
<head>
<title>Oaktown Football Club</title>
<meta charset="UTF-8">
<script src="formValidation.js"></script>
</head>
<body>
<header>
<img src="logo.png" alt="Oaktown Football Club Logo"/>
<h1>Oaktown Football Club</h1>
<nav>
<a href="Index.html">Homepage</a>
<a href="Competitions.html">Competitions</a>
<a href="Contact.html">Contact</a>
</nav>
</header>
<section>
<h2>Contact Us</h2>
<article>
<h3>Secretary</h3>
<p>Name: Laci Tanner</p>
<p>Phone: (02) 6620 3324</p>
<p>Email: <a href="mailto:[email protected]">[email protected]</a></p>
<h3>Leave us a message</h3>
<form method="post" action="actionPage.html" name="contactForm" onsubmit="return formValidation();">
<label>Full Name:</label><br>
<input type="text" size="35" name="fullName" id="name"><br>
<br><label>Email:</label><br>
<input type="text" size="35" name="email" id="email"><br>
<br><label>Phone:</label><br>
<input type="text" size="35" name="phone" id="phone"><br>
<br><label>Team:</label><br>
<select name="team"><br>
<option>Please Choose</option>
<option>Adults</option>
<option>Under 12s</option>
<option>Under 6s</option>
</select><br>
<br><label>I am:</label><br>
<select name="Member"><br>
<option>Please Choose</option>
<option>Thinking about joining the club</option>
<option>Already a club member</option>
</select><br>
<br><label>Comments:</label><br>
<textarea id="comments" type="text" rows="5" cols="75"></textarea><br>
<br><input id="submit" type="submit" value="Submit"><br>
<br><input type="reset">
</form>
</article>
</section>
<footer>
<p>Copyright - Oaktown Football Club</p>
</footer>
</body>
</html>
的JavaScript
function formValidation()
{
var name = document.contactForm.fullName;
var email = document.contactForm.email;
var phone = document.contactForm.phone;
var comment = document.contactForm.comment;
if (fullName.value == "") {
alert("Please enter your name!");
fullName.focus();
return false;
}
if (email.value == "") {
alert("Please enter your email address!");
email.focus();
return false;
}
if (email.value.indexOf("@", 0) < 0) {
alert("Please enter a valid email address!");
email.focus();
return false;
}
if (email.value.indexOf(".", 0) < 0) {
alert("Please enter a valid email address!");
email.focus();
return false;
}
if (phone.value == "") {
alert("Please enter your phone number!");
phone.focus();
return false;
}
if (phone.length < 2) {
alert("Please enter a valid phone number!");
phone.focus();
return false;
}
if (comments.value == "") {
alert("Please leave us a comment!");
comments.focus();
return false;
}
{
return true;
}
}
preventDefault（）会帮助你:) –