Passing Value from a Popup Window Back to the Parent Window

Question

I am using JSF. I try to pass a value that is entered by users in the popup window back to a text field in the parent window.
quote: document.forms[ ].elements[ ] is null or not an object.
The relevant code snippets are shown below. The screen1.jsp is the parent window:
         <script language="JavaScript1.1">
           function doPopup(source)
                popup = window.open("externalFilePopup.jsp",
                    "popup",
                     "height=300,width=200,toolbar=no,menubar=no,"                    + "scrollbars=yes");
                popup.openerFormId = source.form.id;
                popup.focus();
           </script>
<h:outputText value="Enter the external system file name"/>        <h:inputText value="#{dataManagementBean.ip}" size="18" />
<h:commandButton value="..." onclick="doPopup(this); return false;" />
..........The externalFilePopup.jsp is the popup window:
        <script language="JavaScript1.1">
            function doSave( value )
               var formId = window.openerFormId;
               opener.document.forms[ formId ].elements[ formId + ":ip" ].value = value;
               window.close();
        </script>
     <h:outputText value="IP Address: "/>
     <h:inputText size="25" value="#{dataManagementBean.ip }" required="true"/>
     <h:commandButton value="OK" onclick="doSave('#{dataManagementBean.ip}');"/>
        .......... The script error occurs when I click on this OK button.
Please point out the mistakes in my code. Thank you.

Answer 1

I have made some modifications to the code in the popup window. The error reported in my previous posting is gone. But, I still have several problems:
1. syntax error in the popup window jsp page: line 45, char 21, syntax error, ..., Do you want to continue running script on this page?2. The popup window does not close after I click on the OK button that I coded in the popup window jsp.
3. The value that I entered in the popup window eventually gets passed back to the text field in the parent window only if I re-run the application.
The relevant JavaScript code snippets are:
        <script language="JavaScript1.1">
            function doSave( value )
               var formId = window.openerFormId;
               opener.document.forms[ formId ].form[ formId + ":ip" ].value = value;
               window.close();
        </script>
                                   <h:outputText value="IP Address: "/>
     <h:inputText size="25" id="ip" value="#{dataManagementBean.ip }" required="true"/>
     <h:commandButton value="OK" onclick="doSave('ip'); return=false;"/>
......What are the mistakes that I made?