$(document).ready(function () {
 $(".phone").on("change" , "input" , mask_num);
 function mask_num(){
 $.getScript('http://FormsServer/Forms/js/jquery.mask.min.js', function () {
   $(".phone input").mask("(999)999-9999");   
 });
    }
 });

Is it possible to use the phone number masking with Cloud systems?  What would the location value be for the "jquery.mask.min.js" file to be used in the code?