function enrollValidation () {
    var emailField = document.forms[0].email.value;
    var priestsField = document.forms[0].priests.value;
    if (trim(emailField)=="") {
        alert("Please enter an email address before submitting.");
        document.forms[0].email.focus();
        return false;
    }
    if (trim(priestsField)=="") {
        alert("Please enter the name of at least one priest before submitting.");
        document.forms[0].priests.focus();
        return false;
    }
}

function trim(str) {
    return str.replace(/^\s*|\s*$/g,"");
}