Better if condition + next step while pressing enter

Author: afshinm

intro.js

@@ -68,15 +68,12 @@
         if(e.keyCode == 27) {
           //escape key pressed, exit the intro
           _exitIntro.call(self, targetElm);
-        }
-        if([37, 39].indexOf(e.keyCode) >= 0) {
-          if(e.keyCode == 37) {
-            //left arrow
-            _previousStep.call(self);
-          } else if (e.keyCode == 39) {
-            //right arrow
-            _nextStep.call(self);
-          }
+        } else if(e.keyCode == 37) {
+          //left arrow
+          _previousStep.call(self);
+        } else if (e.keyCode == 39 || e.keyCode == 13) {
+          //right arrow or enter
+          _nextStep.call(self);
         }
       };
     }