var doc = app.activeDocument;

// Cache the original ruler origin.
var originalRulerOrigin = doc.viewPreferences.rulerOrigin;

// Set the ruler origin to `page`, and set ruler XY offset to zero.
doc.viewPreferences.rulerOrigin = RulerOrigin.PAGE_ORIGIN;
doc.zeroPoint = [0,0];

// Cache the original ruler units.
var originalXUnits = doc.viewPreferences.horizontalMeasurementUnits;
var originalYUnits = doc.viewPreferences.verticalMeasurementUnits;

// Set the horizontal and vertical ruler units to millimeters.
doc.viewPreferences.horizontalMeasurementUnits = MeasurementUnits.MILLIMETERS;
doc.viewPreferences.verticalMeasurementUnits = MeasurementUnits.MILLIMETERS;


/**
 * Process each Text Frame and act on it as necessary according to its x1 and y1 coordinate.
 * @param {Object} pageRef - A reference to the page to be processed.
 */
function handleTextFrames(pageRef) {
  var allTextFrames = pageRef.textFrames.everyItem().getElements();

  // Loop over each text frame...
  for (var  i = 0, max = allTextFrames.length; i < max; i++) {
    var currentTextFrame = allTextFrames[i];

    // Obtain the text frames x1 and y1 coordinate.
    var currentTextFrameBounds = currentTextFrame.geometricBounds;
    var y1 = currentTextFrameBounds[0];
    var x1 = currentTextFrameBounds[1];


    // Begin targeting specific text frames based on geometry...

    // 1. Delete a Text Frame if its :
    // -  x1 coord is less than or equal to 15mm and
    //   is greater than or equal to 10mm.
    // -  y1 coord is less than or equal to 15mm and
    //   is greater than or equal to 10mm.
    if (x1 <= 15 && x1 >= 10 && y1 <= 15 && y1 >= 10) {
      currentTextFrame.remove();
    }

    // 2. Do something else with a Text Frame when its :
    // - x1 coord is less than or equal to 15mm and
    //   is greater than or equal to 10mm.
    // - y1 coord is less than or equal to 70mm and
    //   is greater than or equal to 60mm.
    if (x1 <= 15 && x1 >= 10 && y1 <= 70 && y1 >= 60) {
      // --> Do soemthing here...
    }

    // 3. Do more conditional checks ....

  }


}

// Loop over each page
for (var i = 0, max = doc.pages.length; i < max; i++) {
  var currentPage = doc.pages[i];
  handleTextFrames(currentPage); // Begin processing each text frame on each page.
}

// Restore rule origin
doc.viewPreferences.rulerOrigin = originalRulerOrigin;

// Restore ruler units
doc.viewPreferences.horizontalMeasurementUnits = originalXUnits;
doc.viewPreferences.verticalMeasurementUnits = originalYUnits;