Scroll Issue with HTML Page in Modal Window

[User13728]

Hi. Thanks for your effort on jquery-modal. It is quite elegant to me.

I was looking for a way to open a full html page in a popup window and came up with your work.
I followed the 4th example on https://jquerymodal.com/. Mozilla Firefox did open the full HTML page (page width is 300 px on a 1200px screen) inside a modal window of 300px width and 100% height. However:

1. The modal screen was aligned to the foremost left of the screen instead of center.
2. The height of the modal screen was to the fullest that close button was not clearly visible. Only 90 degree quarter of full close button circle was displayed on top right corner, which is easy to miss and difficult to click.
3. The page inside the modal window should be scrolled so that the user can see the whole content. However there was no scrollbar in modal window.

I am not much experienced in javascript. Therefore it is not so easy for me to comb your code and find out what part to modify. Would you correct those issues or at least tell me what parts should I focus into? Thank you.