Offset di elementi...valori sballati

function positionOfElementsWithType(type) {
    var elements, i, results = [], curClass;  
    var sc = document;
	var xtotale = "";

    //Get all children of the scope node
    elements = sc.getElementsByTagName('*');
    for( i=0; i < elements.length; i++ ){
        curClass = elements[i].getAttribute('class');
		
		if (curClass != null && curClass == type) {
			var of = ObjectPosition(curClass);
			xtotale += "[X:"+of[0]+",Y:"+of[1]+"],";
		}
    }
	return xtotale;
}

	function ObjectPosition(obj) {
    var curleft = 0;
      var curtop = 0;
      if (obj.offsetParent) {
            do {
                  curleft += obj.offsetLeft;
                  curtop += obj.offsetTop;
            } while (obj = obj.offsetParent);
      }
      return [curleft,curtop];
}