function  BX2IX(B_X, object_img){  
    // browser x to Image X  

    return (B_X - object_img.offsetLeft)+ getScrollLeft() ;  
  
  }  

  function  BY2IY(B_Y, object_img){  
    // browser x to Image X  
    return (B_Y - object_img.offsetTop)+ getScrollTop() ;  
  
  }