window.showModalDialog child window Data Backfill Parent window

window.open The window is open, it is easy to get its parent window. The project needs to open the window with ShowModalDialog, want to get the value of the parent window, but also on the basis of open to modify in order to not let Window.returnvalue return the value is not so annoying, we need to find out how to use ShowModalDialog The window that opens gets its parent window. This problem can be solved by rational use of the parameters passed by ShowModalDialog.

Words not much to say, see Example:

Parent window: a.html

 
 

 
child window: b.html
 
 
 

 
Done.
window.showModalDialog child window Data Backfill Parent window