Parse and handle a basic AJAX response.

AJAX-Response-Handling.js

$.post("ajax_rope_check.php", { //FORM AJAX
   street: s.step_two_street.val(),
   city: s.step_two_city.val(),
   state: s.step_two_state.val(),
   zip: s.step_two_zip.val()  
 })
 
 .done(function(response){ //AJAX RESPONSE
    response = $.parseJSON(response);//CHANGE STR TO OBJ
    if(response.serviceable === true) { 
      //IF TRUE DO NOTHING
  }
  else { //IF FALSE
    s.step_three_not_serviceable.removeClass('is-hidden');
    s.step_three_serviceable.addClass('is-hidden');
  }