Javascript 和 window.document object。 如何更改文档中的值

Question

I have a normal page and popup window. On the popup window, I am modifying the javascript so the callback will change the value on my page (the page behind the popup window). But I am struggling on navigating back to that field in javascript.

I have the following:

window.document.getElementById('mynewfield').value = newValue;

But this is not finding the field and needs to be changed to:

window.ID-OF-MY-WINDOW-BEHIND.document.getElementById('mynewfield').value = newValue;

How can I find out what the ID is? Is there a print_r funciton for javascript?

Answer 1

I think what you're looking for is:

window.opener

You can use this as follows:

window.opener.document.getElementById('mynewfield').value = newValue;