remove white margin with javascript

Is there a another way?
How do acrobat "read out" the value of the "end of text" from each site?

Thank you for you help!

ah. ok. - so I have to find another way to crop the PDF... ;-(

for history:
I am looking for a way to crop the white margin from this pdf

to get this:

I have a lot of diagramms like this (and get them from our productmanagment) - so I´ve created an automatically process ( with VB -> JS)

This diagrams came from excel.
Then I print them (over VB) from excel to PDF.
And now I want to "crop" them.

I´ve also try to crop them with ghostscript (and then convert back to PDF) but sometimes ghostscript does not create the boundingbox correcty (= keept the border there - so there are still there in PDF)
So my idea was to crop the PDF at the biginning.... - in acrobat

I have the Pro-version.
Can I then execute this action from JS?
Or create a menuitem (which exec the action) and then exec the menuitem from JS?

That it the solutioin:

1 : create a VB-Script (.vbs) (see also doku):
Set gPDDoc = CreateObject("AcroExch.PDDoc")
gPDDoc.Open(FileName)
Set jso = gPDDoc.GetJSObject
jso.CropPage FileName
jso.saveAsEPS FileName

2: Create an new JS-file in folder "C:\Program Files (x86)\Adobe\Acrobat 11.0\Acrobat\Javascripts" - all JS-files will be read when Acrobat is starting:
3: write this in the JS-file

function CropPage(FileName)
{
console.clear();
console.show();

Media = this.getPageBox("Media");
this.setPageBoxes("Media", 0, 0, Media);

Crop = this.getPageBox("Crop");
this.setPageBoxes("Crop", 0, 0, Crop);

Trim = this.getPageBox("Trim");
this.setPageBoxes("Trim", 0, 0, Trim);

BBox = this.getPageBox("BBox");
this.setPageBoxes("Crop", 0, 0, BBox);

Bleed = this.getPageBox("Bleed");
this.setPageBoxes("Bleed", 0, 0, Bleed);
}

function saveAsEPS (FileName)
{
console.clear();
console.show();

this.saveAs(FileName + ".eps", "com.adobe.acrobat.eps");
this.closeDoc(true);
}


THANK YOU SO MUCH!

Eugen