Left and Right Icon of date picker not showing in my enviroment.

Left and Right Icon of date picker not showing in my enviroment.

Good day all,

I was follow the date picker in this page (http://jqueryui.com/datepicker/) and successfully create the date picker in my environment.

However, my datepicker does not have the "Left" and "Right" icon. I prefer to make it same as the website.

Here is my screenshot of this website datepicker :


Here is screenshot of datepicker in my own environment :


I am not sure is it I miss out the <link rel="stylesheet" href="/resources/demos/style.css"> as from the source code, or cause by other issue.

Kindly advise.
Thanks.