diff --git a/public/css.php b/public/css.php
index 7404e65c..6236c7e8 100644
--- a/public/css.php
+++ b/public/css.php
@@ -36,11 +36,6 @@ class CSSMin extends BaseMin {
 		$this->group = $groups[$group];
 		$this->last_modified = $this->get_last_modified();
 
-		$this->requested_time = $this->get_if_modified();
-	}
-
-	public function __destruct()
-	{
 		$this->send();
 	}
 
@@ -51,11 +46,10 @@ class CSSMin extends BaseMin {
 	 */
 	protected function send()
 	{
-		/*if($this->last_modified >= $this->requested_time)
+		if($this->last_modified >= $this->get_if_modified() && $this->is_not_debug())
 		{
-			header('304 Not Modified');
-			die();
-		}*/
+			throw new FileNotChangedException();
+		}
 
 		$css = ( ! array_key_exists('debug', $_GET))
 			? $this->compress($this->get_css())
@@ -70,7 +64,7 @@ class CSSMin extends BaseMin {
 	 * @param string $buffer
 	 * @return string
 	 */
-	public function compress($buffer)
+	protected function compress($buffer)
 	{
 		//Remove CSS comments
 		$buffer = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!', '', $buffer);
@@ -142,7 +136,7 @@ class CSSMin extends BaseMin {
 
 		// Correct paths that have changed due to concatenation
 		// based on rules in the config file
-		// $css = str_replace($this->path_from, $this->path_to, $css);
+		$css = str_replace($this->path_from, $this->path_to, $css);
 
 		return $css;
 	}
@@ -152,20 +146,16 @@ class CSSMin extends BaseMin {
 	 *
 	 * @return void
 	 */
-	public function output($css)
+	protected function output($css)
 	{
-		//This GZIPs the CSS for transmission to the user
-		//making file size smaller and transfer rate quicker
-		ob_start("ob_gzhandler");
+		$etag = md5($css);
 
-		header("Content-Type: text/css; charset=utf8");
-		header("Cache-control: public, max-age=691200, must-revalidate");
-		header("Last-Modified: ".gmdate('D, d M Y H:i:s', $this->last_modified)." GMT");
-		header("Expires: ".gmdate('D, d M Y H:i:s', (filemtime(basename(__FILE__)) + 691200))." GMT");
+		if ($etag === $this->get_if_none_match() && $this->is_not_debug())
+		{
+			throw new FileNotChangedException();
+		}
 
-		echo $css;
-
-		ob_end_flush();
+		$this->send_final_output($css, 'text/css', $this->last_modified, $etag);
 	}
 }
 
@@ -177,6 +167,18 @@ class CSSMin extends BaseMin {
 $config = require('../app/config/minify_config.php');
 $groups = require($config['css_groups_file']);
 
-new CSSMin($config, $groups);
+if ( ! array_key_exists($_GET['g'], $groups))
+{
+	throw new InvalidArgumentException('You must specify a css group that exists');
+}
+
+try
+{
+	new CSSMin($config, $groups);
+}
+catch (FileNotChangedException $e)
+{
+	BaseMin::send304();
+}
 
 //End of css.php
\ No newline at end of file
diff --git a/public/js.php b/public/js.php
index 6fccc8ea..bfc18fc3 100644
--- a/public/js.php
+++ b/public/js.php
@@ -44,48 +44,42 @@ class JSMin extends BaseMin {
 		$this->cache_file = "{$this->js_root}cache/{$group}";
 		$this->last_modified = $this->get_last_modified();
 
-		$this->requested_time = $this->get_if_modified();
-
 		$this->cache_modified = (is_file($this->cache_file))
 			? filemtime($this->cache_file)
 			: 0;
-	}
 
-	public function __destruct()
-	{
 		// Output some JS!
 		$this->send();
 	}
 
 	protected function send()
 	{
-		// If the browser's cached version is up to date,
-		// don't resend the file
-		/*if($this->last_modified === $this->requested_time)
-		{
-			header($_SERVER['SERVER_PROTOCOL'].' 304 Not Modified');
-			exit();
-		}*/
-
-		//Determine what to do: rebuild cache, send files as is, or send cache.
-		// If debug is set, just concatenate
-		if(array_key_exists('debug', $_GET))
+		// Override caching if debug key is set
+		if($this->is_debug_call())
 		{
 			return $this->output($this->get_files());
 		}
-		else if($this->cache_modified < $this->last_modified)
+
+		// If the browser's cached version is up to date,
+		// don't resend the file
+		if($this->last_modified >= $this->get_if_modified() && $this->is_not_debug())
+		{
+			throw new FileNotChangedException();
+		}
+
+		if($this->cache_modified < $this->last_modified)
 		{
 			$js = $this->minify($this->get_files());
 
 			//Make sure cache file gets created/updated
-			if(file_put_contents($this->cache_file, $js) === FALSE)
+			if (file_put_contents($this->cache_file, $js) === FALSE)
 			{
-				die('Cache file was not created. Make sure you have the correct folder permissions.');
+				echo 'Cache file was not created. Make sure you have the correct folder permissions.';
+				return;
 			}
 
 			return $this->output($js);
 		}
-		// Otherwise, send the cached file
 		else
 		{
 			return $this->output(file_get_contents($this->cache_file));
@@ -185,7 +179,7 @@ class JSMin extends BaseMin {
 	 * @param string $js
 	 * @return string
 	 */
-	public function minify($js)
+	protected function minify($js)
 	{
 		$options = [
 			'output_info' => 'errors',
@@ -218,19 +212,14 @@ class JSMin extends BaseMin {
 	 */
 	protected function output($js)
 	{
-		//This GZIPs the js for transmission to the user
-		//making file size smaller and transfer rate quicker
-		ob_start('ob_gzhandler');
+		$etag = md5($js);
 
-		// Set important caching headers
-		header('Content-Type: application/javascript; charset=utf8');
-		header('Cache-control: public, max-age=691200, must-revalidate');
-		header('Last-Modified: '.gmdate('D, d M Y H:i:s', $this->last_modified).' GMT');
-		header('Expires: '.gmdate('D, d M Y H:i:s', (filemtime(__FILE__) + 691200)).' GMT');
+		if (($etag === $this->get_if_none_match()) && ! $this->is_debug_call())
+		{
+			throw new FileNotChangedException();
+		}
 
-		echo $js;
-
-		ob_end_flush();
+		$this->send_final_output($js, 'application/javascript', $this->last_modified, $etag);
 	}
 }
 
@@ -249,11 +238,16 @@ if ( ! is_dir($cache_dir))
 
 if ( ! array_key_exists($_GET['g'], $groups))
 {
-	header('Content-Type: application/javascript; charset=utf8');
-	echo '// You must specify a group that exists';
-	die();
+	throw new InvalidArgumentException('You must specify a js group that exists');
 }
 
-new JSMin($config, $groups);
+try
+{
+	new JSMin($config, $groups);
+}
+catch (FileNotChangedException $e)
+{
+	BaseMin::send304();
+}
 
 //end of js.php
\ No newline at end of file
diff --git a/public/js/anime_collection.js b/public/js/anime_collection.js
index 494c2e1c..9c03508f 100755
--- a/public/js/anime_collection.js
+++ b/public/js/anime_collection.js
@@ -18,7 +18,7 @@
 	};
 
 	$.get('/public/templates/anime-ajax-search-results.html', tempHtml => {
-		$('#search').on('keypress', AnimeClient.throttle(250, function(e) {
+		AnimeClient.on('#search', 'keypress', AnimeClient.throttle(250, function(e) {
 			let query = encodeURIComponent($(this).val());
 			if (query === '') {
 				return;
diff --git a/public/js/anime_edit.js b/public/js/anime_edit.js
index 70d5dfbc..201d4a26 100755
--- a/public/js/anime_edit.js
+++ b/public/js/anime_edit.js
@@ -34,12 +34,11 @@
 		}
 
 		// okay, lets actually make some changes!
-		$.ajax({
+		AnimeClient.ajax(AnimeClient.url('/anime/update'), {
 			data: data,
 			dataType: 'json',
 			type: 'POST',
 			mimeType: 'application/json',
-			url: AnimeClient.url('/anime/update'),
 			success: (res) => {
 				if (res.status === 'completed') {
 					$(this).closest('article, tr').hide();
diff --git a/public/js/base/ajax.js b/public/js/base/ajax.js
new file mode 100644
index 00000000..34ea577b
--- /dev/null
+++ b/public/js/base/ajax.js
@@ -0,0 +1,70 @@
+AnimeClient = (function (ac) {
+
+	/**
+	 * Url encoding for non-get requests
+	 *
+	 * @param data
+	 * @returns {string}
+	 * @private
+	 */
+	function serialize(data) {
+		let pairs = [];
+
+		Object.keys(data).forEach((name) => {
+			let value = data[name].toString();
+
+			name = encodeURIComponent(name);
+			value = encodeURIComponent(value);
+
+			pairs.push(`${name}=${value}`);
+		});
+
+		return pairs.join("&");
+	};
+
+	ac.ajax = function(url, config) {
+		// Set some sane defaults
+		config = config || {};
+		config.data = config.data || {};
+		config.type = config.type || 'GET';
+		config.dataType = config.dataType || 'json';
+		config.success = config.success || ac.noop;
+		config.error = config.error || ac.noop;
+
+		let request = new XMLHttpRequest();
+		let method = String(config.type).toUpperCase();
+
+		request.open(method, url);
+
+		request.onreadystatechange = () => {
+			if (request.readyState === 4) {
+				if (request.status > 400) {
+					config.error.call(request.statusText, request.statusText, request.response);
+				} else {
+					config.success.call(request.responseText, request.response, request.responseText);
+				}
+			}
+		};
+
+		switch (method) {
+			case "GET":
+				request.send(null);
+			break;
+
+			default:
+				request.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
+				request.send(serialize(config.data));
+			break;
+		}
+	};
+
+	ac.get = function(url, data, callback) {
+		return ac.ajax(url, {
+			data: data,
+			success: callback
+		});
+	};
+
+	return ac;
+
+})(AnimeClient);
\ No newline at end of file
diff --git a/public/js/base/base.js b/public/js/base/base.js
index ea74dd7f..9c006ba3 100644
--- a/public/js/base/base.js
+++ b/public/js/base/base.js
@@ -1,8 +1,39 @@
-const AnimeClient = (function($, w) {
+var AnimeClient = (function(w) {
 
 	'use strict';
 
+	const slice = Array.prototype.slice;
+
 	return {
+		/**
+		 * Placeholder function
+		 */
+		noop: () => {},
+		/**
+		 * DOM selector
+		 *
+		 * @param {string} selector - The dom selector string
+		 * @param {object} context
+		 * @return {array} - arrau of dom elements
+		 */
+		$(selector, context) {
+			if (typeof selector != "string" || selector === undefined) {
+				return selector;
+			}
+
+			context = (context != null && context.nodeType === 1)
+				? context
+				: document;
+
+			let elements = [];
+			if (selector.match(/^#([\w]+$)/)) {
+				elements.push(document.getElementById(selector.split('#')[1]));
+			} else {
+				elements = slice.apply(context.querySelectorAll(selector));
+			}
+
+			return elements;
+		},
 		/**
 		 * Scroll to the top of the Page
 		 *
@@ -71,4 +102,4 @@ const AnimeClient = (function($, w) {
 			};
 		},
 	};
-})(Zepto, window);
\ No newline at end of file
+})(window);
\ No newline at end of file
diff --git a/public/js/base/event.js b/public/js/base/event.js
new file mode 100644
index 00000000..4307f20d
--- /dev/null
+++ b/public/js/base/event.js
@@ -0,0 +1,41 @@
+AnimeClient = (function (ac) {
+	'use strict';
+
+	function add(sel, event, listener) {
+		// Recurse!
+		if (! event.match(/^([\w\-]+)$/)) {
+			event.split(' ').forEach((evt) => {
+				add(sel, evt, listener);
+			});
+		}
+
+		sel.addEventListener(event, listener, false);
+	}
+	function delegate(sel, target, event, listener) {
+		// Attach the listener to the parent
+		add(sel, event, (e) => {
+			// Get live version of the target selector
+			ac.$(target, sel).forEach((element) => {
+				if(e.target == element) {
+					listener.call(element, e);
+					e.stopPropagation();
+				}
+			});
+		});
+	}
+
+	ac.on = function (sel, event, target, listener) {
+		if (arguments.length === 3) {
+			listener = target;
+			ac.$(sel).forEach((el) => {
+				add(el, event, listener);
+			});
+		} else {
+			ac.$(sel).forEach((el) => {
+				delegate(el, target, event, listener);
+			});
+		}
+	}
+
+	return ac;
+})(AnimeClient);
\ No newline at end of file
diff --git a/public/js/base/events.js b/public/js/base/events.js
index 080855de..22fc3715 100644
--- a/public/js/base/events.js
+++ b/public/js/base/events.js
@@ -1,13 +1,13 @@
 /**
  * Event handlers
  */
-(($) => {
+((ac) => {
 
 	'use strict';
 
 	// Close event for messages
-	$('header').on('click', '.message', function() {
-		$(this).hide();
+	ac.on('header', 'click', '.message', function () {
+		this.setAttribute('hidden', 'hidden');
 	});
 
-})(Zepto);
\ No newline at end of file
+})(AnimeClient);
\ No newline at end of file
diff --git a/public/js/manga_edit.js b/public/js/manga_edit.js
index faa3617b..a6ff9640 100755
--- a/public/js/manga_edit.js
+++ b/public/js/manga_edit.js
@@ -25,13 +25,12 @@
 		// Update the total count
 		data[type + "s_read"] = ++completed;
 
-		$.ajax({
+		AnimeClient.ajax(AnimeClient.url('/manga/update'), {
 			data: data,
 			dataType: 'json',
 			type: 'POST',
 			mimeType: 'application/json',
-			url: AnimeClient.url('/manga/update'),
-			success: (res, status) => {
+			success: (res) => {
 				parent_sel.find(`.${type}s_read`).text(completed);
 				AnimeClient.showMessage('success', `Sucessfully updated ${manga_name}`);
 				AnimeClient.scrollToTop();
diff --git a/public/min.php b/public/min.php
index be3fc0da..48f32b11 100644
--- a/public/min.php
+++ b/public/min.php
@@ -30,18 +30,89 @@ while($i < $pia_len)
 	$i = $j + 1;
 };
 
+class FileNotChangedException extends \Exception {}
 class BaseMin {
-	public function get_if_modified()
+
+	/**
+	 * Get value of the if-modified-since header
+	 *
+	 * @return int - timestamp to compare for cache control
+	 */
+	protected function get_if_modified()
 	{
 		return (array_key_exists('HTTP_IF_MODIFIED_SINCE', $_SERVER))
 			? strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE'])
 			: time();
 	}
 
-	public function get_if_none_match()
+	/**
+	 * Get value of etag to compare to hash of output
+	 *
+	 * @return string - the etag to compare
+	 */
+	protected function get_if_none_match()
 	{
 		return (array_key_exists('HTTP_IF_NONE_MATCH', $_SERVER))
 			? $_SERVER['HTTP_IF_NONE_MATCH']
 			: '';
 	}
+
+	/**
+	 * Determine whether or not to send debug version
+	 *
+	 * @return boolean
+	 */
+	protected function is_not_debug()
+	{
+		return ! $this->is_debug_call();
+	}
+
+	/**
+	 * Determine whether or not to send debug version
+	 *
+	 * @return boolean
+	 */
+	protected function is_debug_call()
+	{
+		return array_key_exists('debug', $_GET);
+	}
+
+	/**
+	 * Send actual output to browser
+	 *
+	 * @param string $content - the body of the response
+	 * @param string $mime_type - the content type
+	 * @param int $last_modified - the last modified date
+	 * @return void
+	 */
+	protected function send_final_output($content, $mime_type, $last_modified, $etag)
+	{
+		//This GZIPs the CSS for transmission to the user
+		//making file size smaller and transfer rate quicker
+		ob_start("ob_gzhandler");
+
+		$expires = $last_modified + 691200;
+		$last_modified_date = gmdate('D, d M Y H:i:s', $last_modified);
+		$expires_date = gmdate('D, d M Y H:i:s', $expires);
+
+		header("Content-Type: {$mime_type}; charset=utf8");
+		header("Cache-control: public, max-age=691200, must-revalidate");
+		header("Etag: {$etag}");
+		header("Last-Modified: {$last_modified_date} GMT");
+		header("Expires: {$expires_date} GMT");
+
+		echo $content;
+
+		ob_end_flush();
+	}
+
+	/**
+	 * Send a 304 Not Modified header
+	 *
+	 * @return void
+	 */
+	public static function send304()
+	{
+		header("status: 304 Not Modified", true, 304);
+	}
 }
\ No newline at end of file