need help in to makes work watermark script in popup window

Question

I am using watermark script to add watermark in my product images and as well in popup here is the url which one i am using on my website

https://www.jqueryscript.net/other/Add-Image-Or-Text-Watermarks-To-Images-with-jQuery-watermark.html

after add code the script working on simple image something like here

https://www.morrans-international.com/product_info.php/source-peter-morran-twist-irvine-beach-park-april-1985-p-9802?cPath=2079

but when you clicking on image a pop is opening, here so the watermark not working in the popup

here is the code

$('.img-responsive').watermark({
        path: 'https://www.morrans-international.com/images/watermark.png',
        margin: 0,
        gravity: 'nw',
        opacity: 0.5,
        outputWidth: 400,
        imageSize: 'big'
    });
     $('.cboxPhoto').watermark({
        path: 'https://www.morrans-international.com/images/watermark.png',
        margin: 0,
        gravity: 'nw',
        opacity: 0.5,
        outputWidth: 400,
        imageSize: 'big'
    });

img-responsive for the image which is on list and cboxPhoto is the popup class please guide

Thank you!