       , false);
     , 5
 
+  hasClass: (ele, cls) ->
+    ele.className.match new RegExp("(\\s|^)" + cls + "(\\s|$)")
+
+  addClass: (ele, cls) ->
+    ele.className += " " + cls  unless @hasClass(ele, cls)
+
+  removeClass: (ele, cls) ->
+    if hasClass(ele, cls)
+      reg = new RegExp("(\\s|^)" + cls + "(\\s|$)")
+      ele.className = ele.className.replace(reg, " ")
+
 root           = this
 previousFlight = root.Flight
 

#backBtn.addEventListener 'touchstart', ->
#  flight.slideTransition('#panel-1','#panel-2','0.4s',true)
$('.back').click (e) =>
    flight.goToPage('#panel-2')

$('.forward').click (e) =>
  flight.goToPage('#panel-1')


#if 'ontouchstart' in window

    @targetPanel = document.querySelector(targetPanel)
    transtionType = @currentPanel.getAttribute("data-transition")

    if @transitionAnimation is true

      switch transtionType
