Waiting for an Ajax response with a looong delay

Waiting for an Ajax response with a looong delay

Hello,
I have the following problem:

I have implemented a jquery tool to drag/resize textboxes. Now, I want to edit the text of the textbox. To do so, a pop up window is launched with a texteditor.
Now my question: My jquery script needs the data of the texteditor. How can I get the event when the text has been submitted?

Codesnippet (jQuery script)
        window.open('url', 'title', 'menubar=no,width=800,height=370,toolbar=no');
       
        var xhr;
        if (window.XMLHttpRequest) {
            xhr = new XMLHttpRequest();
        } else if (window.ActiveXObject) {
            xhr = ActiveXObject("Msxm12.XMLHTTP");
        }           
        xhr.open('GET', url);
        xhr.send(null);
       
        xhr.onreadystatechange = function() {
            if (xhr.readyState == 4) {
                if (xhr.status >= 200 && xhr.status == 300) {
                    // fires immediately when the pop up is opened
                }
            }
        }

the onreadystate function fires when the popup is launched. How can I get the event (with the text) when the form in the pop up window is submitted?

Many thanks,
mannyk