对于为W3C和Microsoft事件模型定义的匿名函数，都可以将FadingTooltip对象的指针封闭在其中。

You could have enclosed a pointer to your FadingTooltip object in the anonymous functions you defined for the W3C and Microsoft event models as well.

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fill() 方法使所有子路径封闭起来，然后逐个填充每个子路径，期间使用 fillStyle （一种颜色，或一个渐变对象）来决定如何绘制填充。

The fill() method closes any subpaths and then fills each subpath in turn using fillStyle (which can be a color, or, as discussed later, a gradient object) to determine how to draw the fill.

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填充区域-无论什么时候一系列的直线或曲线封闭一块区域，你都可以使得那个区域被用当前的GDI画刷对象填充。

Filled areas Whenever a series of lines or curves encloses an area, you can cause that area to be filled with the current GDI brush object.

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