jquery is dropped

scripts/script.js

-$(function() {
+var domSlides = document.querySelectorAll('section.slide'),
+	url = document.location,
+	slides = [],
+	backhash = {},
+	linkScreen = document.querySelector('link[title=screen]'),
+	linkProjection = document.querySelector('link[title=projection]');
 
-	var domSlides = $( 'section.slide' ),
-        location = document.location,
-        slides = [],
-        backhash = {},
-        linkScreen = $( 'link[title=screen]' ),
-        linkProjection = $( 'link[title=projection]' );
+for(var i = 0, len = domSlides.length; i < len; i++) {
+	var id = domSlides[i].id;
+	slides[i] = '#' + id;
+	backhash['#' + id] = i;
+}
 
-    for (var i = 0, len = domSlides.length; i < len; i++) {
-        var id = domSlides[i].id;
-        slides[i] = '#' + id;
-        backhash['#' + id] = i;
-    }
+function fullScreen() {
+	return window.screenX == 0 &&
+		window.screenY == 0 &&
+		screen.width == window.outerWidth &&
+		screen.height == window.outerHeight;
+}
 
-	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[url.hash],
+		target,
+		command;
+	switch(e.which) {
+		case 33 : // PgUp
+		case 38 : // Up
+		case 37 : // Left
+			current--;
+			break;
+		case 34 : // PgDown
+		case 40 : // Down
+		case 39 : // Right
+			current++;
+			break;
+		case 32 : // Space
+			current += e.shiftKey ? -1 : 1;
+			break;
+		default:
+			return;
 	}
-	
-	function turnSlide( e ) {
-		if( !fullScreen() ) return;
-		var current = backhash[location.hash],
-            target,
-            command;
-		switch ( e.which ) {
-			case 33 : // PgUp
-			case 38 : // Up
-			case 37 : // Left
-                current--;
-				break;
-			case 34 : // PgDown
-			case 40 : // Down
-			case 39 : // Right
-                current++;
-				break;
-			case 32 : // Space
-                current += e.shiftKey ? -1 : 1;
-				break;
-			default:
-				return;
-		}
-        target = slides[current];
-		e.preventDefault();
-		if( target ) location.hash = target;
-	}
-
-	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 );
+	target = slides[current];
+	e.preventDefault();
+	if(target) url.hash = target;
+}
 
-	$( window ).
-		ready( updateView ).
-		resize( updateView );
+function updateView() {
+	var fullscreen = fullScreen();
+	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