Display popup window on roll over on the cell in ADG

Question

Hi All,
I want to create a application where a popup window will be opened when user mouse roll over on a cell and closed when roll out from the cell. actually i want to use a popup window same as toolTip feature of ADG. I have implement it by many ways:
1. by combination mouse move, ITEM_ROLL_OVER, ITEM_ROLL_OUT of ADG.
2. By Rool over and roll out of custom item renderer But each time i am facing a run time error while rolling mouse in cell. error is in updateLastActiveForm() of systemManager class. 
Get the project file from here http://old.nabble.com/file/p29836926/popupinColumn.zip
 Error:
Error
        at mx.managers::SystemManager/updateLastActiveForm()[C:\autobuild\3.2.0\frameworks\projects\ framework\src\mx\managers\SystemManager.as:5087]
        at mx.managers::SystemManager/activateForm()[C:\autobuild\3.2.0\frameworks\projects\framewor k\src\mx\managers\SystemManager.as:2352]
        at mx.managers::SystemManager/activate()[C:\autobuild\3.2.0\frameworks\projects\framework\sr c\mx\managers\SystemManager.as:2307]
        at mx.managers::FocusManager/creationCompleteHandler()[C:\autobuild\3.2.0\frameworks\project s\framework\src\mx\managers\FocusManager.as:1592]
        at flash.events::EventDispatcher/dispatchEventFunction()
        at flash.events::EventDispatcher/dispatchEvent()
        at mx.core::UIComponent/dispatchEvent()[C:\autobuild\3.2.0\frameworks\projects\framework\src \mx\core\UIComponent.as:9298]
        at mx.core::UIComponent/set initialized()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\UIComponent.as :1169]
        at mx.managers::LayoutManager/doPhasedInstantiation()[C:\autobuild\3.2.0\frameworks\projects \framework\src\mx\managers\LayoutManager.as:718]
        at Function/http://adobe.com/AS3/2006/builtin::apply()
        at mx.core::UIComponent/callLaterDispatcher2()[C:\autobuild\3.2.0\frameworks\projects\framew ork\src\mx\core\UIComponent.as:8628]
        at mx.core::UIComponent/callLaterDispatcher()[C:\autobuild\3.2.0\frameworks\projects\framewo rk\src\mx\core\UIComponent.as:8568] Please let me know if any one have a solution. Thanks
Sachin dev tripathi(DevSachin)

Answer 1

1. adding a RawText item to your page.
2. binding a attribute of VO to the RawText. (ex: VO Name:TempVO; Attribute name:Script)
3. writing coding in your processFormRequest
am.invoke("showMessage");
4. writing a method in your AM
public void showMessage()
Row row = getTempVO().first();
row.setAttribute("Script", "<script>alert('test');</script>");
}