/**
*  jquery.popupt
*  (c) 2008 Semooh (http://semooh.jp/)
*
*  Dual licensed under the MIT (MIT-LICENSE.txt)
*  and GPL (GPL-LICENSE.txt) licenses.
*
**/
(function($) {
    $.fn.extend({
        imghover: function(opt) {
            return this.each(function() {
                opt = $.extend({
                    prefix: '',
                    suffix: '_o',
                    src: '',
                    btnOnly: true,
                    fade: false,
                    fadeSpeed: 500
                }, opt || {});

                var node = $(this);
                if (!node.is('img') && !node.is(':image')) {
                    var sel = 'img,:image';
                    if (opt.btnOnly) sel = 'a ' + sel;
                    node.find(sel).imghover(opt);
                    return;
                }

                var orgImg = node.attr('src');

                var hoverImg;
                if (opt.src) {
                    hoverImg = opt.src;
                } else {
                    hoverImg = orgImg;
                    if (opt.prefix) {
                        var pos = hoverImg.lastIndexOf('/');
                        if (pos > 0) {
                            hoverImg = hoverImg.substr(0, pos - 1) + opt.prefix + hoverImg.substr(pos - 1);
                        } else {
                            hoverImg = opt.prefix + hoverImg;
                        }
                    }
                    if (opt.suffix) {
                        var pos = hoverImg.lastIndexOf('.');
                        if (pos > 0) {
                            hoverImg = hoverImg.substr(0, pos) + opt.suffix + hoverImg.substr(pos);
                        } else {
                            hoverImg = hoverImg + opt.suffix;
                        }
                    }
                }

                if (opt.fade) {
                    var offset = node.offset();
                    var hover = node.clone(true);
                    hover.attr('src', hoverImg);
                    hover.css({
                        position: 'absolute',
                        left: offset.left,
                        top: offset.top,
                        zIndex: 1000
                    }).hide().insertAfter(node);
                    node.mouseover(
            function() {
                var offset = node.offset();
                hover.css({ left: offset.left, top: offset.top });
                hover.fadeIn(opt.fadeSpeed);
                node.fadeOut(opt.fadeSpeed, function() { node.show() });
            }
          );
                    hover.mouseout(
            function() {
                node.fadeIn(opt.fadeSpeed);
                hover.fadeOut(opt.fadeSpeed);
            }
          );
                } else {
                    node.hover(
            function() { node.attr('src', hoverImg) },
            function() { node.attr('src', orgImg) }
          );
                }
            });
        }
    });
})(jQuery);