Lightbox Popup without close button

Hi,

I need a free wp Lightbox popup plugin without close button which can overlay all posts and pages on a website.

I found this one https://xyzscripts.com/wordpress-plugins/lightbox-pop/details
but it does not work all time well on all posts. Only on the main page it works 90% but other posts and pages sometimes works and sometimes not.

Hope you have good alternatives for this Plugin.



Thanks.

P.S. I do not want on maintenance plugin. I need like that lightbox popup.