Simple E-Mail Validation

[CMellor]

Hello,

I am stuck, as I am in the need for a very simple way to validate e-mail address' when a form has been submitted. My form is using AJAX to submit the form, and when a field is missed out, an alert() appears with the error. Here is my code for reference:

[code]function sendAppForm() {
// Error checking
// Display Name
if(document.app_form.display_name.value == "") {
alert("Please choose a superstar!");
document.app_form.display_name.focus();
return;
}
if(document.app_form.display_name.value.length < 3 || document.app_form.display_name.value.length > 32) {
alert("Your selected superstar has a too short or long name");
document.app_form.display_name.focus();
return;
}
// Username
if(document.app_form.username.value == "") {
alert("Please choose a username");
document.app_form.username.focus();
return;
}
if(document.app_form.username.value.length < 3 || document.app_form.username.value.length > 32) {
alert("Your selected username has a too short or long name");
document.app_form.username.focus();
return;
}
// Password
if(document.app_form.password.value == "") {
alert("Please choose a password");
document.app_form.password.focus();
return;
}
if(document.app_form.password.value.length < 3 || document.app_form.password.value.length > 32) {
alert("Your selected password has a too short or long name");
document.app_form.password.focus();
return;
}
// E-Mail

// Role Play
if(document.app_form.roleplay.value == "") {
alert("You MUST provide a Role Play!");
return;
}

ajax.open('POST', 'ajax/send_app.php');
ajax.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
ajax.onreadystatechange = function() {
if(ajax.readyState == 4 && ajax.status == 200) {
document.getElementById("appForm").innerHTML = ajax.responseText;
}
};
ajax.send('superstar='+document.app_form.display_name.value);
}[/code]

I've tried a few bits of code, and they do actually validate the e-mail when it's not inserted correctly, but when it is and I try to submit the form, well it just won't submit.

Any help would be greatly appreciated!

Thanks!

Chris.

[fenway]

You're probably missing a return true;  at thend.