CODE EXAMPLE FOR JAVASCRIPT

click outside of the modal to close it

var images_modal = document.getElementById('images-model-div');

var videos_modal = document.getElementById('video-model-div');

// When the user clicks anywhere outside of the modal, close it

window.onclick = function(event) {

   if (event.target == images_modal) {

      images_modal.style.display = "none";

    }

    if (event.target == videos_modal) {

      videos_modal.style.display = "none";

    }

}