Asynchronously Executes JavaScript in the current window/frame.

        :Args:
         - script: The JavaScript to execute.
         - \\*args: Any applicable arguments for your JavaScript.

        :Usage:
            ::

                script = "var callback = arguments[arguments.length - 1]; " \\
                         "window.setTimeout(function(){ callback('timeout') }, 3000);"
                driver.execute_async_script(script)

def execute_async_script(self, script, *args):
        """
        Asynchronously Executes JavaScript in the current window/frame.

        :Args:
         - script: The JavaScript to execute.
         - \\*args: Any applicable arguments for your JavaScript.

        :Usage:
            ::

                script = "var callback = arguments[arguments.length - 1]; " \\
                         "window.setTimeout(function(){ callback('timeout') }, 3000);"
                driver.execute_async_script(script)
        """
        converted_args = list(args)
        if self.w3c:
            command = Command.W3C_EXECUTE_SCRIPT_ASYNC
        else:
            command = Command.EXECUTE_ASYNC_SCRIPT

        return self.execute(command, {
            'script': script,
            'args': converted_args})['value']