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Attributes/Properties属性
The following table lists the members exposed公开，暴露 by the window object窗口对象. Click a tab on the left to choose the type of member you want to view.

Opens a new window and loads the document specified具体指定 by a given URL.
打开一个新窗口，并加载一个URL指向的的文件

Optional可选的. String that contains a list of items separated by commas逗号. Each item consists of an option选项 and a value, separated by an equals sign (for example, "fullscreen=yes, toolbar=yes").
setInterval:Evaluates 执行，赋值an expression each time a specified number of milliseconds has elapsed过去.