function calculateOffset(curElement, event) {
      var element = curElement,
        offsetX = 0,
        offsetY = 0;
      p.pmouseX = p.mouseX;
      p.pmouseY = p.mouseY;
      if (element.offsetParent) {
        do {
          offsetX += element.offsetLeft;
          offsetY += element.offsetTop
        } while ( !! (element = element.offsetParent))
      }
      element = curElement;
      do {
        offsetX -= element.scrollLeft || 0;
        offsetY -= element.scrollTop || 0
      } while ( !! (element = element.parentNode));
      offsetX += stylePaddingLeft;
      offsetY += stylePaddingTop;
      offsetX += styleBorderLeft;
      offsetY += styleBorderTop;
      offsetX += window.pageXOffset;
      offsetY += window.pageYOffset;
      return {
        "X": offsetX,
        "Y": offsetY
      }
    }
    function updateMousePosition(curElement, event) {
      var offset = calculateOffset(curElement, event);
      p.mouseX = event.pageX - offset.X;
      p.mouseY = event.pageY - offset.Y
    }