PDF文档过期时间/自毁设置

不是很完美的方法，可以凑活着用：

切换到Pages预览页，右击页面选页面属性

切换到Action，选Run a Javascript，代码：

// PDF JavaScript to make it a "TRIAL EDITION". 

// Set the date you would like it to EXPIRE ON. 
var d1 = ("mm/dd/yy", "7/1/04"); 

// Let the script do the work... 
var expire_on_X_days_left = 0; 
var d2 = new Date(); 
var diff = (() - ()) / 1000; 
var daysleft = ((diff / 60) / 60) / 24; 
if( daysleft > expire_on_X_days_left || daysleft == expire_on_X_days_left ) 
{ 
    (1); 
    //("This document cannot be viewed anymore."); 
    this.closeDoc(); 
} 
// :-) Script by Brian (thedude at bri1 com).

不知道能否连接到internet时间，然后再判断