Crop image in script like with crop tool

How to crop image using javascript the same way like photoshop do this with crop tool?

I have a folder with images and i want to crop every image like photoshop doing with these constant sizes in inches:

var neededSizes = [
	[5,7],
	[8, 10],
	[9, 12],
	[11, 14],
	[16, 20],
	[18, 24],
	[24, 36],
	[23 + 3/8, 33 + 1/8]
	]

So for every photo i need to get 8 more cropped photos which saving in folder with same name as image filename.

I wrote part of code and now i can create and save these photos in folders, but i totally don't understand how to crop image the same way as crop tool... So here is a code: 

// Took first code variation from Nathaniel Young (nyoungstudios)

function main() {
	
  // parameters
  var quality = 12;
  var neededSizes = [
	[5,7],
	[8, 10],
	[9, 12],
	[11, 14],
	[16, 20],
	[18, 24],
	[24, 36],
	[23 + 3/8, 33 + 1/8]
	]
	
  // opens folder dialog for user to select the folder to process
  var inputFolder = Folder.selectDialog("Choose a source folder");

  // checks if user selected no folder
  if (inputFolder == null) {
    return;
  }
  
  // regular expression to match file types
  var fileTypes = new RegExp('.*.jpg|.*.png|.*.tif|.*.jpeg', 'i');

  // gets list of files that match regular expression
  var fileList = inputFolder.getFiles(fileTypes);

  // loops over each file in the folder
  for (var i = 0; i < fileList.length; i++) {
    // gets file path name
    var filePathName = fileList[i].toString();

    // removes the file extension
    var baseDocName = filePathName.substring(filePathName.lastIndexOf('/') + 1, filePathName.lastIndexOf('.'));
    var saveLocation = filePathName.substring(0, filePathName.lastIndexOf('/') + 1) + baseDocName + '/';

    // Creates folder if it does not already exist
    var folder = new Folder(saveLocation);
    if (!folder.exists) {
        folder.create();
    }
	
	//block to identify vertical or horizontal images
	
	// loop over each crop format
	for (var iSize = 0; iSize < neededSizes.length; iSize++) {
		
		// appends the width of the document
		newDocName = baseDocName + '_' + neededSizes[iSize][0] + 'x' + neededSizes[iSize][1];
		
		displayDialogs = DialogModes.NO
		
		// opens photo
		var imgFile = app.open(new File(filePathName));
		
		// gets the current active document open
		currentDocument = app.activeDocument;
		
		// crop photo
		app.preferences.rulerUnits = Units.INCHES
		currentDocument.resizeCanvas(neededSizes[iSize][0], neededSizes[iSize][1])
		// currentDocument.crop(new Array(100, 200, 400, 500), 45, 20, 20);
		
		// saves jpg photo
		var newJpgFile = new File(saveLocation + newDocName + '.jpg');
		jpgSaveOptions = new JPEGSaveOptions();
		jpgSaveOptions.quality = quality;
		currentDocument.saveAs(newJpgFile, jpgSaveOptions, true, Extension.LOWERCASE);
		
		// closes photoshop file
		currentDocument.close(SaveOptions.DONOTSAVECHANGES);
	}
  }
};

main();