The Dialogs library contains functions that displays alert messages.会话库（Dialogs）包含了显示警报信息（alert message）的函数。
WMLScript Dialogs Library FunctionsWMLScript 会话库（Dialogs Library）函数
Function函数Description描述alert()Displays a message and waits for a confirmation显示一条信息并等待确认confirm()Displays a message and waits for an answer显示一条信息并等待回答prompt()Displays a question and waits for an input显示一个问题并等待输入
