 
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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