Fixed double-space typo.
diff --git a/user_guide/nav/moo.fx.js b/user_guide/nav/moo.fx.js
index 256371d..b21ee20 100755
--- a/user_guide/nav/moo.fx.js
+++ b/user_guide/nav/moo.fx.js
@@ -25,8 +25,8 @@
 	},
 
 	step: function() {
-		var time  = (new Date).getTime();
-		var Tpos   = (time - this.startTime) / (this.duration);
+		var time = (new Date).getTime();
+		var Tpos  = (time - this.startTime) / (this.duration);
 		if (time >= this.duration+this.startTime) {
 			this.now = this.to;
 			clearInterval (this.timer);