[jQuery] Form and Validation Plugins

I have created a new site that has a contact page and am trying to use
the Forms plugin and Validation plugin. I can get the validation
plugin to work fine and submit the form when it is valid but I am
trying to use AJAX to update a div when the form has been successfully
sent. All that is happening is it sends the form then validates
meaning I get empty emails.. this is my code

<script>
// prepare the form when the DOM is ready
$(document).ready(function() {
var options = {
beforeSubmit: function() {
return $('#signupForm').validate().form();
},

target: '#output2', // target element(s) to be updated with
server response
beforeSubmit: showRequest, // pre-submit callback
success: showResponse // post-submit callback

// other available options:
//url: url // override for form's 'action'
attribute
//type: type // 'get' or 'post', override for
form's 'method' attribute
//dataType: null // 'xml', 'script', or
'json' (expected server response type)
//clearForm: true, // clear all form fields after
successful submit
//resetForm: true // reset the form after successful
submit

// $.ajax options can be used here too, for example:
//timeout: 3000
};

// bind to the form's submit event
$('#signupForm').submit(function() {
// inside event callbacks 'this' is the DOM element so we
first
// wrap it in a jQuery object and then invoke ajaxSubmit
$(this).ajaxSubmit(options);

// !!! Important !!!
// always return false to prevent standard browser submit and
page navigation
return false;
});

$("#signupForm").validate({
rules: {
sendto: {
required: true
},
fullname: "required",
lastname: "required",
email: {
required: true,
email: true
},
enquiry: {
required: true
}

},
messages: {
sendto: "Please tell us who you wish to Contact",
fullname: "Please enter your Name",
lastname: "Please enter your lastname",
email: "Please enter a valid email address",
enquiry: "Please leave us a message"
}
});

});

// pre-submit callback
function showRequest(formData, jqForm, options) {
// formData is an array; here we use $.param to convert it to a
string to display it
// but the form plugin does this for you automatically when it
submits the data
var queryString = $.param(formData);

// jqForm is a jQuery object encapsulating the form element. To
access the
// DOM element for the form do this:
// var formElement = jqForm[0];

alert('About to submit: \n\n' + queryString);

// here we could return false to prevent the form from being
submitted;
// returning anything other than false will allow the form submit
to continue
return true;
}

// post-submit callback
function showResponse(responseText, statusText) {
// for normal html responses, the first argument to the success
callback
// is the XMLHttpRequest object's responseText property

// if the ajaxSubmit method was passed an Options Object with the
dataType
// property set to 'xml' then the first argument to the success
callback
// is the XMLHttpRequest object's responseXML property

// if the ajaxSubmit method was passed an Options Object with the
dataType
// property set to 'json' then the first argument to the success
callback
// is the json data object returned by the server

alert('status: ' + statusText + '\n\nresponseText: \n' +
responseText +
'\n\nThe output div should have already been updated with the
responseText.');
}
</script>

and the webpage is http://blackandmcfadden.com.au/newsite/fiat/contact.html

Some help please