$(document).ready(function () {

    $('body').on('keydown keyup', function(e) {

​

      var keyAction = {

​

        82  : ['body', 'css', "background", ['red','white'] ],  // R key

        66  : ['body', 'css', "background", ['blue','white'] ], // B key

        72  : ['h1', 'animate', "top", [100,30] ]       // H key

      },

          key = e.which,              // Get the keyCode

          keyArr = keyAction[key],    // get our array from our list

          io  = e.type=="keydown" ? 0 : 1, // io will be 0 || 1 depending if key is down or up

          element,

          method,

          property={}; // the Method Properties Object will look like e.g: {"background":"red"}

      if(typeof keyArr != "undefined"){

         element = keyArr[0], 

         method = keyArr[1],

         property[keyArr[2]] = keyArr[3][io];       

         $(element)[method](property);  // do stuff

      }

​

      console.log( key, io, element, method, property);

​

    });

​

});