using .join method to convert array to string without commas

Possible Duplicate: array join() method without a separator I'm using `.join()` to convert my array to a string so I can output it in a text box as the user selects numbers in a calculator, I'm not entirely sure how I can remove the commas that are also being output in the list however. Can someone advise how this can be achieved or if there is a different approach I should be using? JS ``` $(document).ready(function() { var total = 0; var arr = []; //Testing $('#calculator').children('.num').on('click', function(e) { var clickedNumber = $(this).data('id'); arr.push(clickedNumber); console.log(arr.join()); e.preventDefault(); }); });​ ``` JS Fiddle http://jsfiddle.net/CVr25/