+
+Mousetrap.bind('z', function() { $("#pic").toggleClass("fit_view"); });
+Mousetrap.bind('n', function() { input_index ++; setpic(); });
+Mousetrap.bind('p', function() { input_index --; setpic(); });
+Mousetrap.bind('b', function() { exposure ++; setpic(); });
+Mousetrap.bind('d', function() { exposure --; setpic(); });