show or hide watermarks in the pdf doucument

hi all,

 

how show or hide watermark digitally signed pdf document using java script.

use this:

 

function togglewm(vis) {

  o = this.getocgs();

  for(var i=0;i<o.length;i++) if (o[i].name == "watermark") o[0].state = vis;

}

 

then can call togglewm(true); etc required.

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