Added FullScreen Mode for Snake Game

Author: yokesharun

index.html

@@ -24,6 +24,7 @@ <h4>Theme
     </h4>
     <div id="mode-wrapper" style="display: inline; width: auto;">
     	<h2>Select which mode you would like to play in.</h2>
+    	<button onclick="go_full_screen()">Full Screen</button><br />
     	<button id="Easy">Easy</button><br />
     	<button id="Medium">Medium</button><br />
     	<button id="Difficult">Difficult</button>
@@ -73,8 +74,21 @@ <h2>Select which mode you would like to play in.</h2>
 		var mySnakeBoard = new SNAKE.Board(  {
 		    boardContainer: "game-area",
 		    fullScreen: true
-		});    
-
+		});  
     </script>
+    <script type="text/javascript">
+      function go_full_screen(){
+        var elem = document.documentElement;
+        if (elem.requestFullscreen) {
+          elem.requestFullscreen();
+        } else if (elem.msRequestFullscreen) {
+          elem.msRequestFullscreen();
+        } else if (elem.mozRequestFullScreen) {
+          elem.mozRequestFullScreen();
+        } else if (elem.webkitRequestFullscreen) {
+          elem.webkitRequestFullscreen();
+        }
+      }
+  </script>
 </body>
 </html>