I saw contactform.html and think may be some problem with included javacode:
Code
//<![CDATA[
(function ($) {
$(document).ready(function () {
$('#contactForm').submit(function (event) {
$.ajax({
url: '?a=contact',
type: 'POST',
data: $('#contactForm').serialize(),
complete: function (xhr, status) {
var resp = xhr.responseText.substr('success='.length);
if ('true' == resp) {
$('#contactFormResponse').html('<div>Your message succesfully sent!</div>');
$('#contactForm')[0].reset();
} else {
resp = resp[0].toUpperCase() + resp.substr(1);
$('#contactFormResponse').html('<div class="error">' + resp + '</div>');
}
}
});
return false;
});
});
})(jQuery);
//]]>
</script>