[Solved] Radgrid gridtable view apply multiple filters via filter method

[Brete]

I am filtering a grid (tableview) in javascript  to filter to a single condition. 

 

 $find(tableViewID).filter("Photo_Group", args.get_item().get_value(), "EqualTo");

 

However, where can I find how to filter to multiple conditions.  

Ie the above condition OR filter("Photo_Group", "-1", "EqualTo");

I can see how to do this using the Filtering control,  but I cannot show/use a filtering control on the page.