function validate_signup(frm) {
    var isError = false;
    var emailAddress = frm.Email.value;
    var confirmemail = frm.Email2.value;
    var first = frm.FirstName.value;
    var last = frm.Surname.value;
    
    if (emailAddress == "" || emailAddress.indexOf("@") == -1) {
        alert("Please enter your email address");
        isError = true;
    }

    if (confirmemail != emailAddress) {
        alert("Please confirm your email address");
        isError = true;
    }

    if (first == "") {
        alert("Please enter your first name");
        isError = true;
    }

    if (last == "") {
        alert("Please enter your last name");
        isError = true;
    }

    return !isError;
}