jquery: zoomblo, light weight image zoomer

jquery.zoomblo.js

(function($) {

  $.fn.zoomblo = function(full) {

    $(this).css({
      position: 'relative',
      overflow: 'hidden'
    });

    var org = {
          h: $(this).find('img').height(),
          w: $(this).find('img').width()
        };

    var zoom = $('<img>').attr('src', full)
        .css({
          position: 'absolute',
          left: $(this).css('paddingLeft'),
          top: $(this).css('paddingTop'),
          opacity: 0 
        });

    function show_zoom() {
      zoom.css({opacity: 1});
    }

    function hide_zoom() {
      zoom.css({opacity: 0}); 
    }

    function move_zoom(e) {
      var x = e.pageX - $(this).offset().left,
          y = e.pageY - $(this).offset().top;

      zoom.css({
        top:    -1 * ((zoom.h - org.h) * (y / org.h)),
        left:   -1 * ((zoom.w - org.w - 30) * (x / org.w))
      });

    }

    function get_dimensions(e) {
      zoom.w =    e.target.naturalWidth;
      zoom.h = e.target.naturalHeight;
    }

    return this.each(function() {
      $(this).append(zoom);
      zoom.on('load', get_dimensions);

      $(this).on('mouseenter', show_zoom);
      $(this).on('mouseleave', hide_zoom);
      $(this).on('mousemove', move_zoom);
    });
  }
  
})(jQuery)