So we’ll complicate things just a touch and create a button on the page, for which we’ll write an event handler to pop up a message box saying "Hello world", instead.
为了演示这一面，我们来做一个稍稍复杂一点的例子 ：在页面上创建一个按钮，然后用一个事件处理器来响应按钮事件并弹出一个消息框显示“Hello world”字样。
You should see a message box reminding you that you are required to deploy a JAX-RPC handler whose job it is to set the transport.url property for each message to this service.
您应该看到一个消息框，提示您需要部署一个JAX - RPC处理程序，这个处理程序的主要工作就是为每个到此服务的消息设置transport . ur l属性值。
The behavior in an application would be that first this handler would show its message box and then the visual change in the virtual method's handler would be shown.
应用程序中的行为将是该处理程序首先显示其消息框，随后将显示虚方法处理程序中的可视变化。
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