function checkEmail() {

    var email = document.getElementById("qbEmail").value;
    var name = document.getElementById("qbName").value;

    var pattern = /^([a-zA-Z0-9_.-])+@([a-zA-Z0-9_.-])+\.([a-zA-Z])+([a-zA-Z])+/;

    if (name.length == 0) {
        alert('Please enter your name.');
        document.getElementById("qbName").focus();
    }
    else if (pattern.test(email)) {
        alert('We will send an email to ' + email + ' as soon as possible informing you of your requested session.\r\n\r\nThank you.');
        document.quickBook.submit();
    }
    else {
        alert('Please enter a valid email address.');
        document.getElementById("qbEmail").focus();
    }
}