Global properties, like global functions, may be accessed from any script in a movie. They store information that is generally useful, from any point in our code. Many of them affect the entire Flash Player, not just a particular movie clip or movie.
Table 20-2 lists the global properties available in Flash 5.
| 
 Property Name  | 
 Description  | 
|---|---|
| 
 _focusrect  | 
 The highlight state of buttons activated via the keyboard  | 
| 
 _highquality  | 
 The rendering quality of the Player*  | 
| 
 Infinity  | 
 A constant representing the Infinity value of the number type  | 
| 
 -Infinity  | 
 A constant representing the -Infinity value of the number type  | 
| 
 _leveln  | 
 A document level in the Player  | 
| 
 NaN  | 
 Not-A-Number; the value of the number type representing invalid numeric data  | 
| 
 _quality  | 
 The rendering quality of the Player  | 
| 
 _root  | 
 A reference to the main movie timeline of the current level  | 
| 
 _soundbuftime  | 
 Number of seconds of a streaming sound to preload  | 
| 
 $version*  | 
 The version of the Flash Player  | 
*Deprecated in Flash 5.
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