Fileupload is a modal window with iframe, label, button and input fileupload

<window title="fileupload demo" border="normal"><button label="Upload"><attribute name="onClick">{Object media = Fileupload.get();if (media instanceof org.zkoss.image.Image) {Image image = new Image();image.setContent(media);image.setParent(pics);} else if (media != null)Messagebox.show("Not an image: "+media, "Error", Messagebox.OK, Messagebox.ERROR);}</attribute></button><vbox id="pics"/></window>

Fileupload embedded

<window title="fileupload demo" border="normal"><fileupload onUpload="handle(event)"/></window>