let username = document.forms["RegForm"]["Name"];

let email = document.forms["RegForm"]["Email"];

let phoneNumber = document.forms["RegForm"]["Telephone"];

let select = document.forms["RegForm"]["Subject"];

let pass = document.forms["RegForm"]["Password"];

if (username.value == "") {

alert("Please enter your name.");

username.focus();

return false;

}

if (email.value == "") {

alert("Please enter a valid e-mail address.");

email.focus();

return false;

}

if (email.value.indexOf("@", 0) < 0) {

alert("Please enter a valid e-mail address.");

email.focus();

return false;

}

if (email.value.indexOf(".", 0) < 0) {

alert("Please enter a valid e-mail address.");

email.focus();

return false;

}

if (phoneNumber.value == "") {

alert("Please enter your telephone number.");

phoneNumber.focus();

return false;

}

if (pass.value == "") {

alert("Please enter your password");

pass.focus();

return false;

}