Can't change the document title when the browser is opened in dialog mode

Question

Hello experts,
I'm working on a solution which involves opening up another .jspx page in dialog mode. I need to change the title of the dialog browser window dynamically when the user performs a specific action on the dialog page.
Unfortunately, I can't get this to work. I have tried using JavaScript and had no luck. I tested this technique on a non-dialog page and it works fine. Please help.
Here is the markup code for launching the dialog page:
<af:activeCommandToolbarButton id="actbPreview"
icon="/graphics/previewscreen_enabled.gif";
text="Preview"
action="dialog:weCreate"
useWindow="true"
windowHeight="620"
windowWidth="1120"
disabled="#{empty bindings.MapElemUnqId.inputValue}"
launchListener="#{backing_weQuery.launchPreviewerListener}"
binding="#{backing_weQuery.actbPreview}"
returnListener="#{backing_weQuery.returnPreviewerListener}"
clientComponent="true"
windowModalityType="applicationModal"
windowEmbedStyle="window"
disabledIcon="/graphics/previewscreen_disabled.gif";/>
On the dialog page, here is the markup and javascript for setting the browser window title:
<af:commandButton text="title" id="cb10">
<af:clientListener method="setWindowTitle"
type="action"/>
</af:commandButton>
function setWindowTitle(actionEvent)
actionEvent.cancel();
var doc = AdfPage.PAGE.findComponent("d1");
doc.setTitle("TEST");
alert("Title="+doc.getTitle());
}

Answer 1

Thanks for your response.
I tried that and I could not get it to work. Even though I can set pageFlowScope.pageTitle dynamically, the browser window title does not refresh (I tried to refresh via PPR and full post back).
here is my code:
public void setPageTitle(ActionEvent actionEvent)
RequestContext requestContext = RequestContext.getCurrentInstance();
Map pfs = requestContext.getPageFlowScope();
pfs.put("pageTitle","TEST 2");
RequestContext.getCurrentInstance().addPartialTarget(this.document);
public void setPageTitle(ActionEvent actionEvent)
RequestContext requestContext = RequestContext.getCurrentInstance();
Map pfs = requestContext.getPageFlowScope();
pfs.put("pageTitle","TEST 2");
FacesContext context = FacesContext.getCurrentInstance();
String currentView = context.getViewRoot().getViewId();
ViewHandler vh = context.getApplication().getViewHandler();
UIViewRoot x = vh.createView(context, currentView);
x.setViewId(currentView);
context.setViewRoot(x);
}