Button is not clickable if we need to pass an object to onclick event

I have a datagrid and a dataview listening to datagrid. I have couple of text fields that are populated based on datagrid row selection and I also need a button on dataview that opens a popup page and shows different kind of data. When I select a page for onclick event and this page requires datagrid row object as parameter the button is not clickable. But if I remove page parameter button is clickable. 
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