Increases image size on mouse enter

increase-img-size-on-mouseenter.js

$(function(){
  $('img.expand').each(function(key, el){
    var $el = $(el)
      , image
      , originalWidth, originalHeight
      , width, height;

    width = $el.attr('width');
    height = $el.attr('height');

    if(!width || !height)
      return;

    image = new Image();
    image.onload = function(){
      originalWidth = image.width;
      originalHeight = image.height;
    }

    image.src = $el.attr('src');

    $el.bind('mouseenter mouseleave', function(e) {
      $(this).stop().animate({
        width: (e.type === 'mouseenter' ? originalWidth : width),
        height: (e.type === 'mouseenter' ? originalHeight : height)
      });
    });
  });
});