javascript - ReferenceError: event is not defined on keyup event in firefox -

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Why does this code not work in Firefox? I want to create a switch image in the gallery on the keypot event. I had read similar problems and answers, but nobody helped me JQuery 1.4.4 My code: 

  $ ('body'). Live ('keyup', function (e) {if (e.keycode == 37) {$ ('. DaPrev'). Click ()} and if (e.keycode ==39) {$ ('. DaNext When I press the console:  
  Reference error: Event is not defined    I have not named any event in your code, and it looks valid. However, there are some things you can try: 
 
     
  •  Use .delegate 
    •  
  •  Try a new version of jQuery and switch. 
    •  
 
 .delegate: 
   $ Representative (selector, event type, handler);  
 
 ie. 
 
  $ Representative ("div", "keyup", function (e) {...});

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