| function open_and_add_load_event(href, func) { | |
| // While not practically possible, opening "blank" first and setting the | |
| // href after allows for the theoretical possibility of registering the event | |
| // after the window is loaded. | |
| let popup_window = window.open("about:blank"); | |
| assert_not_equals(popup_window, null, "Popup windows not allowed?"); | |
| popup_window.addEventListener('load', func, false); | |
| popup_window.location.href=href; | |
| } |