Question

I have a page with two buttons, one Button opens a popup window with the next function:

function MM_openBrWindow(theURL,winName,features) { //v2.0
  my_window=window.open(theURL,winName,features);
}

and I need to detect from that window (my_window) when the second button in the parent page is clicked and raise an alert.

How can I do that?

Answer 1

You would do my_window.alert("hey") in the click event for the second button in the parent window. If you want to access the parent window from the child window (to add an event, for example), use window.opener in the child window.

button2.onclick = function (e) {
   my_window.buttonTwoHasBeenClicked(); // this is defined in the child window.. once executed it means the button has been clicked.
}

If you want to define the event from within the child window:

// put this in your child window javascript source
// also change "button2" to whatever your second button's ID is.
window.opener.getElementById("button2").onclick = function () {
   alert("button has been clicked on parent window");
}