def _click(x=nil, y=nil)
         if (x and y) then
            driver.MouseClick("left", x, y)
         else
            driver.MouseClick("left")
         end
      end
def _click(x=nil, y=nil)
         if (x and y) then
            driver.MouseClick("left", x, y)
         else
            driver.MouseClick("left")
         end
      end
intance methods