Alternative to switch statement, JavaScript

switchjs.js

== requires jquery ====
==== html ======
  <div id="show"></div>
  
  ===== js ======
  
function switchcase(cases,defaultCase,key) {
 if (cases.hasOwnProperty(key)) {
 	return cases[key];
  } else {
  	return defaultCase;
  }
}

var getDay = switchcase({
  0: 'Sunday',
  1: 'Monday',
  2: 'Tuesday',
  3: 'Wednesday',
  4: 'Thursday',
  5: 'Friday',
  6: 'Saturday'
},'Sunday', new Date().getDay());

$('#show').html(getDay);