date picker not showing calendar image

date picker not showing calendar image

Here is my code:
  2. $( "#datepicker" ).datepicker({
  3.       showOn: "button",
  4.       buttonImage: "images/calendar.gif",
  5.       buttonImageOnly: true,
  6.       buttonText: "Select date"
  7.     });
In the working directory, there is an images folder, then a file called this.  Why isn't this image showing up?