Please note, this is a STATIC archive of website developer.mozilla.org from 03 Nov 2016, cach3.com does not collect or store any user information, there is no "phishing" involved.

onpopupshowing

onpopupshowing
Type: script code
This event is sent to a popup just before it is opened. This handler is usually used to dynamically set the contents when the user requests to display it. Returning false from this event handler prevents the popup from appearing.

Document Tags and Contributors

 Contributors to this page: Sheppy, Marsf, Mgjbot, BenoitL, Dria
 Last updated by: Sheppy,