Hi,
Try:
procedure TMainForm.UniButton1Click(Sender: TObject);
var
s: string;
begin
s := 'something';
UniSession.AddJS(UniHTMLMemo1.JSName + '.insertAtCursor("'+ s +'")');
// or - UniSession.AddJS(UniHTMLMemo1.JSName + '.insertAtCursor("'+ s +'" + " ")');
end;
Best regards.