$(function(){
	// hide/show header
	$('#close-open-top a').bind('click', function() {
		if($('header:visible').length) {
			$('img', this).attr('src', 'images/open.png');
		} else {
			$('img', this).attr('src', 'images/close.png');
		}
		$('header').slideToggle('slow'); 
		return false;
	});
	// tabs
	$('.tab_content').hide();
	$('ul.tabs li:first').addClass('active').show();
	$('.tab_content:first').show();
	$('ul.tabs li').click(function() {
		$('ul.tabs li').removeClass('active');
		$(this).addClass('active');
		$('.tab_content').hide();
		var activeTab = $(this).find('a').attr('href');
		$(activeTab).fadeIn();
		return false;
	});
	// hide/show default text when user focuses on newsletter subscribe field
	var defaultEmailTxt = $('#email-address').val();
	$('#email-address').focus(function() {
		if ($('#email-address').val() == defaultEmailTxt) {
			$('#email-address').val('');
		}
	});
	$('#email-address').blur(function() {
		if ($('#email-address').val() == '') {
			$('#email-address').val(defaultEmailTxt);
		}
	});
	// Lightbox
	$(".gallery a[rel^='prettyPhoto']").prettyPhoto({animationSpeed:'slow',theme:'dark_rounded',slideshow:4000, autoplay_slideshow: false});
	// Tipsy
	$('#social li a img').tipsy({delayIn: 1200, delayOut: 1200, gravity: 's'});
	// init newsletter subscription AJAX handling
	$('#newslettersubmit').click(function() { $('#newsletterform').submit(); return false; });
	$('#newsletterform').ajaxForm({dataType: 'json',
	timeout: 2000,
	success: newsletterResponse});
	// Twitter script config
	if ($('#tweet').length) {
		getTwitters('tweet', {
			id: 'envatowebdesign',
			count: 3,
			enableLinks: true,
			ignoreReplies: true,
			template: '"%text%" <a class="meta" href="http://twitter.com/%user_screen_name%/status/%id%">%time%</a>'
		});
	}
	// init contact form validation and AJAX handling
	if ($("#contactform").length > 0) {
		$("#contactform").validate({ rules: { name: "required",
		email: { required: true, email: true },
		message: "required"},
		messages: { name: "This field is required.",
		email: { required: "This field is required.",
		email: "Please enter a valied email address."},
		message: "This field is required."},
		submitHandler: function(form) {$(form).ajaxSubmit({dataType: 'json', success: contactFormResponse}); }
		});
	}
});
// handle newsletter subscribe AJAX response
function newsletterResponse(response) {
	if (response.responseStatus == 'err') {
		if (response.responseMsg == 'ajax') {
			alert('Error - this script can only be invoked via an AJAX call.');
		} else if (response.responseMsg == 'fileopen') {
			alert('Error opening $emailsFile. Please refer to documentation for help.');
		} else if (response.responseMsg == 'email') {
			alert('Please enter a valid email address.');
		} else if (response.responseMsg == 'duplicate') {
			alert('You are already subscribed to our newsletter.');
		} else if (response.responseMsg == 'filewrite') {
			alert('Error writing to $emailsFile. Please refer to documentation for help.');
		} else {
			alert('Undocumented error. Please refresh the page and try again.');
		}
	} else if (response.responseStatus == 'ok') {
		alert('Thank you for subscribing to our newsletter! We will not abuse your address.');
	} else {
		alert('Undocumented error. Please refresh the page and try again.');
	}
} // newsletterResponse
// handle contact form AJAX response
function contactFormResponse(response) {
	if (response.responseStatus == 'err') {
		if (response.responseMsg == 'ajax') {
			alert('Error - this script can only be invoked via an AJAX call.');
		} else if (response.responseMsg == 'notsent') {
			alert('We are having some mail server issues. Please refresh the page or try again later.');
		} else {
			alert('Undocumented error. Please refresh the page and try again.');
		}
	} else if (response.responseStatus == 'ok') {
		alert('Thank you for contacting us! We\'ll get back to you ASAP.');
	} else {
		alert('Undocumented error. Please refresh the page and try again.');
	}
} // contactFormResponse