relative position of an object to the margins

Thanx Bob, thankx Brian.

My problem was the absolute Position on both sides of a double sided document.

But I found the solution, it's the red line:

var myDoc = app.activeDocument;

var theSelection = myDoc.selection;
var numSelection = theSelection.length;

app.doScript(auswahlCheck, ScriptLanguage.JAVASCRIPT, undefined, UndoModes.ENTIRE_SCRIPT, "Process Table");

function auswahlCheck(){

objArray = [];

for (i=0; i<numSelection; i++){objArray.push(theSelection[i]);}

objArray.sort(function (a, b) {return Number(a.geometricBounds[0]) - Number(b.geometricBounds[0]);});

for (i=0; i<numSelection; i++) {

var myObj = objArray[i];
var myPage = theSelection[i].parentPage;

var hoehe = myObj.geometricBounds[2]-myObj.geometricBounds[0];
var breite = myObj.geometricBounds[3]-myObj.geometricBounds[1];

if (i==0) {var y1 = myPage.bounds[0]+myPage.marginPreferences.top;}

else if (i>0) {
var vorherigesObj = objArray[i-1];
var y1 = vorherigesObj.geometricBounds[2]+1.764 ;
}

var x1 = myPage.bounds[1]+myPage.marginPreferences.left;
var y2 = y1+ hoehe;

if (i==2) {var y2 = myPage.bounds[2]-myPage.marginPreferences.bottom}

var x2 = myPage.bounds[3]-myPage.marginPreferences.right;

myObj.geometricBounds= [y1,x1,y2,x2];

}

}