JavaScript 调用 Acrobat static object

请问javescript 调用adobe 软件方法：adobe Acrobat 10 SDK
Acrobat SDK API References
app object

A static JavaScript object that represents the Acrobat application. It defines a number of Acrobat-specific functions plus a variety of utility routines and convenience functions.
Example

Print out a listing of available printers:
    var l = app.printerNames.length    for ( var i = 0; i < l; i++)        console.println("(" + (i+1) + ") " + app.printerNames[i]);
在html 中出现 app undefine
是否用ActiveXObjec 声明