Improve README.md

Author: williamdes

README.md

@@ -16,13 +16,13 @@ Usage
 -----
 
 ### Entering Fullscreen mode
- 
+
 You can either switch the whole page or a single HTML element to fullscreen
 mode:
-
+```js
     $(document).fullScreen(true);
     $("#myVideo").fullScreen(true);
-
+```
 This only works when the code was triggered by a user interaction (For
 example a onclick event on a button). Browsers don't allow entering
 fullscreen mode without user interaction.
@@ -33,10 +33,10 @@ fullscreen mode without user interaction.
 Fullscreen mode is always exited via the document but this plugin allows
 it also via any HTML element. The owner document of the selected HTML 
 element is used then:
-
+```js
     $(document).fullScreen(false);
     $("#myVideo").fullScreen(false);
-
+```
 
 ### Querying Fullscreen mode
 
@@ -46,41 +46,41 @@ browser doesn't support this) when fullscreen mode is active, `false` if not
 active or `null` when the browser does not support fullscreen mode at all. 
 So you can use this method also to display a fullscreen button only when the
 browser supports fullscreen mode:
-
+```js
     $("#fullscreenButton").toggle($(document).fullScreen() != null))
-
+```
 
 ### Toggling Fullscreen mode
 
 The plugin provides another method for simple fullscreen mode toggling:
-
+```js
     $(document).toggleFullScreen();
-
+```
 
 ### Notifications
 
 The plugin triggers a `fullscreenchange` event on the document when the 
 fullscreen mode has been changed. If the browser rejected a fullscreen 
 state change then the plugin triggers a `fullscreenerror` event on the
 document. Example:
-
+```js
     $(document).bind("fullscreenchange", function() {
         console.log("Fullscreen " + ($(document).fullScreen() ? "on" : "off"));
     });
 
     $(document).bind("fullscreenerror", function() {
         alert("Browser rejected fullscreen change");
     });
-
+```
 
 ### Fullscreen iframe
 
 Entering fullscreen mode from within an iframe is not allowed by default but
 it can be enabled with a few attributes on the iframe:
-
+```html
     <iframe src="iframe.html" webkitAllowFullScreen mozAllowFullScreen allowFullScreen>
     </iframe>
-
+```
 ### Known issues
 
 * In IE 11 an empty page is displayed when entering fullscreen from within an