I have a webpage http://videa.com.tr/. If I enter the page from iPhone Safari and then click 'Gizlilik ve Güvenlik' a modal opens but I cannot slide it to down or up the background slides but not the text inside modal. Except for mobile Safari, it works fine (on Android), and desktop web (haven't tried iPad)
It is just HTML, JS and CSS (no backend code) page.
I changed to colorbox(http://www.jacklmoore.com/colorbox/) than my own. So it is working now.