function validateForm(form) {
    for (var i = 0; i < form.elements.length; i++) {
        var name = form.elements[i].name;
        if ("name" == name) {
            if (isEmpty(form.elements[i].value)) {
                alert('You must enter your name!');
                return false;
            }
        } else if ("email" == name) {
            if (!isEmail(form.elements[i].value)) {
                alert('Invalid e-mail address entered!');
                return false;
            }
        }
    }
    return true;
}
function isEmpty(value) {
    return value.match(/^\s*$/) == 0;
}
function isEmail(email) {
    return email.match(/^[\w-+.!]+@[\w.]+$/) != null;
}