$(function() {
  $(".interaktivkarte img").imagetool({
    viewportWidth: 428
   ,viewportHeight: 428
   ,topX: 100
   ,topY: 100
   ,bottomX: 428
   ,bottomY: 428
   ,callback: function(topX, topY, bottomX, bottomY) {     
     $("input.values").val("(" + topX + "," + topY + ")" + "(" + bottomX + "," + bottomY + ")");
    }
   ,loading: "load.gif"
  });
});