final TextTemplate template = new PackagedTextTemplate(this.getClass(), "myScript.js");
    Map<String, Object> parameters = new HashMap<String, Object>();
    parameters.put("pageNameUrl", this.pageNameUrl);     

    Label label = new Label("test", template.asString(parameters));
    label.setRenderBodyOnly(true);
    label.setEscapeModelStrings(false);