in customer/src/customer/index.js [243:253]
function resetForm() {
domHide('alert-agent-left');
document.getElementById('startChat').disabled = false;
document.getElementById('firstName').disabled = false;
document.getElementById('username').disabled = false;
$('#section-chat').removeAttr('style');
$('#nav').css('width', '690');
$('#section-chat').hide('slide');
document.getElementById('contactDetails').reset();
document.getElementById('startChat').value = "Speak to an agent";
}