Artboards and origin

Question

Hi, I'm trying to draw some objects to fixed positions on artboards by first setting the document origin to the top - left position of the artboard. However this seems to work for some of the artboards but not for all.
Sample code:
#target illustrator
// create artboards
var CurrentDoc = app.documents.add ( DocumentColorSpace.CMYK, 595, 841, 12, DocumentArtboardLayout.GridByRow, 50, 6);
var artboardRef = CurrentDoc.artboards;
// loopt through all artboards
for ( var i = 0; i < artboardRef.length; i++ )
   // set page and ruler origin
   var RulerLeft = artboardRef[i].artboardRect[0];
   var RulerTop  = artboardRef[i].artboardRect[1] ;
   CurrentDoc.rulerOrigin = [RulerLeft,RulerTop];
   CurrentDoc.pageOrigin  = [RulerLeft,RulerTop];
   //add text to artboard
   var cTextRef = CurrentDoc.textFrames.add();
   cTextRef.textRange.characterAttributes.textFont=app.textFonts.getByName("Verdana");
   cTextRef.textRange.characterAttributes.size = 27;
   cTextRef.contents = "ArtBoard: "+ (i+1);
   cTextRef.left = +55;
   cTextRef.top = -64;
   redraw();
8 out of 12 artboards get the text at the right position (but not in the right order when I look at the artboards palette). Text for 4 artboards is placed completely outside any of the artboards.
Any help is appreciated,
Michel

Answer 1

Some Math operation is Ok, no need to set origin.
#target illustrator
// create artboards
var CurrentDoc = app.documents.add ( DocumentColorSpace.CMYK, 595, 841, 12, DocumentArtboardLayout.GridByRow, 50, 6);
var artboardRef = CurrentDoc.artboards;
// loopt through all artboards
for ( var i = 0; i < artboardRef.length; i++ )
   // set page and ruler origin
   var RulerLeft = artboardRef[i].artboardRect[0];
   var RulerTop  = artboardRef[i].artboardRect[1] ;
   //CurrentDoc.rulerOrigin = [RulerLeft,RulerTop];
   //CurrentDoc.pageOrigin  = [RulerLeft,RulerTop];
   //add text to artboard
   var cTextRef = CurrentDoc.textFrames.add();
   cTextRef.textRange.characterAttributes.textFont=app.textFonts.getByName("Verdana");
   cTextRef.textRange.characterAttributes.size = 27;
   cTextRef.contents = "ArtBoard: "+ (i+1);
   cTextRef.left = RulerLeft +55;
   cTextRef.top = RulerTop -64;
   redraw();