Thank you Vasil for the quick reply. Sorry I left out, this is all happening in a RadGrid. Turns out the issue is the line below. It's pulling the first row "[0]" I need to find out a way to determine which row I need (it varies) and then feed that to the client side. Anyway that's not your problem, it's mine, thank you very much for your help. - Steven
varentityKeyName = $find("<%= RadGridMultiIncomeSummary.ClientID%>").get_masterTableView().get_dataItems()[0].("txtCurrentAmount");