setPageBoxes + Trim and Bleed

Hello,

I’m using Acrobat X prof and I’m trying to set page boxes (crop, trim and bleed) through javascript but the only box I’m able to set/change is the cropbox!

This is the code I’m working with and what I run from within the javascript console:

var rCrop = this.getPageBox("Crop",this.pageNum);

rCrop[0] += 56.69290161; // Adjust Left Side

rCrop[1] -= 56.69290161; // Adjust Top Side

rCrop[2] -= 56.69290161; // Adjust Right Side

rCrop[3] += 56.69290161; // Adjust Bottom Side

this.setPageBoxes("Crop",this.pageNum,this.pageNum,rCrop);

By changing “Crop” in the last row to “Trim” or “Bleed” and re-execute the code I thought I should be able to set those boxes as well?

Eventually I’m going to set all these 3 boxes to different values but for now I’m just trying to set the bleed and trim!

Any ideas of  what I’m doing wrong would be much appreciated.

Regards

MD