Bring the child popup(light box) above the parent popup(fancy box)

Bring the child popup(light box) above the parent popup(fancy box)

I have a div with a name/id of div1 which consists of elements and buttons
that are got dynamically, When i press on one of the buttons in the div1 a
popup opens up (lightbox).
Now what i want is, i want to use a separate button to show the elements
inside the div1 in a new popup for which i've used fancy box.
And in the fancybox popup the elements/buttons present from the div1 are
shown, when i press one of the buttons in the fancybox popup, the new
popup(lightbox) appears behind the parent popup (fancybox).
What should i do to make the child popup (lightbox) appear over the parent
popup (fancy box) and not behind the parent popup .