fixed admin page loading

public/src/app.js

@@ -302,6 +302,9 @@ var socket,
 		var	formattingBar = document.querySelector('.formatting-bar'),
 			postContentEl = document.getElementById('post_content');
 		jQuery('#post_window').slideToggle(0);
+
+		if(formattingBar) {
+
 			formattingBar.addEventListener('click', function(e) {
 				if (e.target.nodeName === 'I' || e.target.nodeName === 'SPAN') {
 					var	cursorEnd = postContentEl.value.length,
@@ -360,7 +363,8 @@ var socket,
 					}
 				}
 			}, false);
-	})
+		}
+	});