resize pages based on elements

Hi,

this is the first time I try to resize something. Try the following lines:

var curDoc = app.activeDocument;
var allPages = curDoc.pages;
hM = curDoc.viewPreferences.horizontalMeasurementUnits;
vM = curDoc.viewPreferences.verticalMeasurementUnits;
curDoc.viewPreferences.horizontalMeasurementUnits = MeasurementUnits.points;
curDoc.viewPreferences.verticalMeasurementUnits = MeasurementUnits.points;
for ( var i = 0; i < allPages.length; i++ ) {
    var curPage = allPages;
    var tf = curPage.textFrames[0];
    var tfWidth = tf.geometricBounds[3] - tf.geometricBounds[1];
    var tfHeight = tf.geometricBounds[2] - tf.geometricBounds[0];
    curPage.resize(CoordinateSpaces.INNER_COORDINATES,
                                AnchorPoint.TOP_LEFT_ANCHOR, 
                                ResizeMethods.REPLACING_CURRENT_DIMENSIONS_WITH,
                                [tfWidth, tfHeight]);
                                tf.move([0,0]);                            
}
curDoc.viewPreferences.horizontalMeasurementUnits = hM;
curDoc.viewPreferences.verticalMeasurementUnits = vM;

Some questions to the advanced scripters:

1. What does 'CoordinateSpaces.INNER_COORDINATES' means?

2. How can I check the values of 'CoordinateSpaces'?

3. Why do I get an error, if the rulers are set to 'mm' instead of points? I assume that it has something to do with margins? But I’m not able to find the real problem.

Thanks

Kai