adding popup windows like safari

Hi all,

i want to add popup window to the screen,
for example
if u click on safari browser a web page will be opened,
you can see events at bottom like +(plus symbol) and book marks
when u click on +(plus symbol) a popup window with three buttons is shown
like "Add to Bookmarks" "Add to Home Screen" ,"Cancel"

like this i want to create popup window any help is appreciated

thanks
santosh g