如何使用jQuery来更改组中除一个元素之外的所有元素的属性

I have following code that shows a light box for my image gallery. There are three images and I need to allow users to click on any of the images to see the gallery in a lightbox. The issue is that when I click on one image it does not show the selected image rather shows the first image in the list / or last image that user has seen last time that opened the lightbox. I have following code that shows a light box fo