jquery is dropped

scripts/script.js

-$(function() {
-
-	var domSlides = $( 'section.slide' ),
-        location = document.location,
+var domSlides = document.querySelectorAll('section.slide'),
+	url = document.location,
 	slides = [],
 	backhash = {},
-        linkScreen = $( 'link[title=screen]' ),
-        linkProjection = $( 'link[title=projection]' );
+	linkScreen = document.querySelector('link[title=screen]'),
+	linkProjection = document.querySelector('link[title=projection]');
 
-    for (var i = 0, len = domSlides.length; i < len; i++) {
+for(var i = 0, len = domSlides.length; i < len; i++) {
 	var id = domSlides[i].id;
 	slides[i] = '#' + id;
 	backhash['#' + id] = i;
-    }
+}
 
-	function fullScreen() {
+function fullScreen() {
 	return window.screenX == 0 &&
 		window.screenY == 0 &&
 		screen.width == window.outerWidth &&
 		screen.height == window.outerHeight;
-	}
+}
 
-	function turnSlide( e ) {
-		if( !fullScreen() ) return;
-		var current = backhash[location.hash],
+function turnSlide(e) {
+	if(!fullScreen()) return;
+	var current = backhash[url.hash],
 		target,
 		command;
-		switch ( e.which ) {
+	switch(e.which) {
 		case 33 : // PgUp
 		case 38 : // Up
 		case 37 : // Left
@@ -44,21 +42,16 @@ $(function() {
 	}
 	target = slides[current];
 	e.preventDefault();
-		if( target ) location.hash = target;
-	}
+	if(target) url.hash = target;
+}
 
-	function updateView() {
+function updateView() {
 	var fullscreen = fullScreen();
-		linkScreen.attr( 'disabled', fullscreen );
-		linkProjection.attr( 'disabled', !fullscreen );
-        if( fullscreen && !backhash[location.hash]) location.hash = slides[0];
-	}
-
-	$( document ).
-		keyup( turnSlide );
-
-	$( window ).
+	linkScreen.disabled = fullscreen;
+	linkProjection.disabled = !fullscreen;
+	if(fullscreen && !backhash[url.hash]) url.hash = slides[0];
+}
+
+window.addEventListener('DOMContentLoaded', updateView, false);
+window.addEventListener('resize', updateView, false);
+document.addEventListener('keyup', turnSlide, false);
\ No newline at end of file
-		ready( updateView ).
-		resize( updateView );
-
-});