javascript form validation
<!DOCTYPE html>
<html>
<head>
<script>
function validateForm() {
var x = document.forms["Form"]["email"].value;
var atpos = x.indexOf("@");
var dotpos = x.lastIndexOf(".");
if (atpos<1 || dotpos<atpos+2 || dotpos+2>=x.length) {
alert("Not a valid e-mail address");
return false;
}
var a = document.forms["Form"]["password"].value;
if (a == null || a == "") {
alert("Password must be filled out");
return false;
}
}
</script>
</head>
<body>
<form name="Form" action="#" onsubmit="return validateForm();" method="post">
Email: <input type="text" name="email">
Password: <input type="password" name="password">
<input type="submit" value="Submit">
</form>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<script>
function validateForm() {
var x = document.forms["Form"]["email"].value;
var atpos = x.indexOf("@");
var dotpos = x.lastIndexOf(".");
if (atpos<1 || dotpos<atpos+2 || dotpos+2>=x.length) {
alert("Not a valid e-mail address");
return false;
}
var a = document.forms["Form"]["password"].value;
if (a == null || a == "") {
alert("Password must be filled out");
return false;
}
}
</script>
</head>
<body>
<form name="Form" action="#" onsubmit="return validateForm();" method="post">
Email: <input type="text" name="email">
Password: <input type="password" name="password">
<input type="submit" value="Submit">
</form>
</body>
</html>
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