jQuery.fn.fancyZoom = function(options) {

    var options = options || {};
    var directory = options && options.directory ? options.directory : 'images';
    var activate_event = options && options.activate ? options.activate : null;
    var close_event = options && options.close ? options.close : null;
    var zooming = false;

    if ($('#zoom').length == 0) {
        var ext = $.browser.msie ? 'gif' : 'png';
        var html = '<div id="zoom" style="display:none;"> \
<table id="zoom_table" style="border-collapse:collapse; width:100%; height:100%;"> \
<tbody> \
<tr> \
<td class="tl" style="background:url(' + directory + '/tl.' + ext + ') 0 0 no-repeat; width:20px; height:20px; overflow:hidden;" /> \
<td class="tm" style="background:url(' + directory + '/tm.' + ext + ') 0 0 repeat-x; height:20px; overflow:hidden;" /> \
<td class="tr" style="background:url(' + directory + '/tr.' + ext + ') 100% 0 no-repeat; width:20px; height:20px; overflow:hidden;" /> \
</tr> \
<tr> \
<td class="ml" style="background:url(' + directory + '/ml.' + ext + ') 0 0 repeat-y; width:20px; overflow:hidden;" /> \
<td class="mm" style="background:#fff; vertical-align:top; padding:10px;"> \
<div id="zoom_content"> \
</div> \
</td> \
<td class="mr" style="background:url(' + directory + '/mr.' + ext + ') 100% 0 repeat-y; width:20px; overflow:hidden;" /> \
</tr> \
<tr> \
<td class="bl" style="background:url(' + directory + '/bl.' + ext + ') 0 100% no-repeat; width:20px; height:20px; overflow:hidden;" /> \
<td class="bm" style="background:url(' + directory + '/bm.' + ext + ') 0 100% repeat-x; height:20px; overflow:hidden;" /> \
<td class="br" style="background:url(' + directory + '/br.' + ext + ') 100% 100% no-repeat; width:20px; height:20px; overflow:hidden;" /> \
</tr> \
</tbody> \
</table> \
<a href="#" title="Close" id="zoom_close" style="position:absolute; top:0; left:0;"> \
<img src="' + directory + '/closebox.' + ext + '" alt="Close" style="border:none; margin:0; padding:0;" /> \
</a> \
</div>';

        $('body').append(html);

        $('html').click(function(e) {
            if ($(e.target).parents('#zoom:visible').length == 0) hide();
        }
        );
        $(document).keyup(function(event) {
            if (event.keyCode == 27 && $('#zoom:visible').length > 0) hide();
        });

        $('#zoom_close').click(hide);
    }

    var zoom = $('#zoom');
    var zoom_table = $('#zoom_table');
    var zoom_close = $('#zoom_close');
    var zoom_content = $('#zoom_content');
    var middle_row = $('td.ml,td.mm,td.mr');

    this.each(function(i) {
        $($(this).attr('href')).hide();
        $(this).click(show);
    });

    return this;

    function show(e) {
        if (activate_event)
            activate_event();
        if (zooming) return false;
        zooming = true;
        var content_div = $($(this).attr('href'));
        var zoom_width = options.width;
        var zoom_height = options.height;

        var width = window.innerWidth || (window.document.documentElement.clientWidth || window.document.body.clientWidth);
        var height = window.innerHeight || (window.document.documentElement.clientHeight || window.document.body.clientHeight);
        var x = window.pageXOffset || (window.document.documentElement.scrollLeft || window.document.body.scrollLeft);
        var y = window.pageYOffset || (window.document.documentElement.scrollTop || window.document.body.scrollTop);
        var window_size = { 'width': width, 'height': height, 'x': x, 'y': y }

        var width = (zoom_width || content_div.width()) + 60;
        var height = (zoom_height || content_div.height()) + 60;
        var d = window_size;

        // ensure that newTop is at least 0 so it doesn't hide close button
        var newTop = Math.max((d.height / 2) - (height / 2) + y, 0);
        var newLeft = (d.width / 2) - (width / 2);
        var curTop = e.pageY;
        var curLeft = e.pageX;

        zoom_close.attr('curTop', curTop);
        zoom_close.attr('curLeft', curLeft);
        zoom_close.attr('scaleImg', options.scaleImg ? 'true' : 'false');

        $('#zoom').hide().css({
            position: 'absolute',
            top: curTop + 'px',
            left: curLeft + 'px',
            width: '1px',
            height: '1px'
        });

        fixBackgroundsForIE();
        zoom_close.hide();

        if (options.closeOnClick) {
            $('#zoom').click(hide);
        }

        if (options.scaleImg) {
            zoom_content.html(content_div.html());
            $('#zoom_content img').css('width', '100%');
        } else {
            zoom_content.html('');
        }

        $('#zoom').animate({
            top: newTop + 'px',
            left: newLeft + 'px',
            opacity: "show",
            width: width,
            height: height
        }, 500, null, function() {
            if (options.scaleImg != true) {
                zoom_content.html(content_div.html());
            }
            unfixBackgroundsForIE();
            zoom_close.show();
            zooming = false;
        })
        return false;
    }

    function hide() {
        if (zooming) return false;
        zooming = true;
        $('#zoom').unbind('click');
        fixBackgroundsForIE();
        if (zoom_close.attr('scaleImg') != 'true') {
            zoom_content.html('');
        }
        zoom_close.hide();
        $('#zoom').animate({
            top: zoom_close.attr('curTop') + 'px',
            left: zoom_close.attr('curLeft') + 'px',
            opacity: "hide",
            width: '1px',
            height: '1px'
        }, 500, null, function() {
            if (zoom_close.attr('scaleImg') == 'true') {
                zoom_content.html('');
            }
            unfixBackgroundsForIE();
            zooming = false;
        });
        if (close_event)
            close_event();
        return false;
    }

    function switchBackgroundImagesTo(to) {
        $('#zoom_table td').each(function(i) {
            var bg = $(this).css('background-image').replace(/\.(png|gif|none)\"\)$/, '.' + to + '")');
            $(this).css('background-image', bg);
        });
        var close_img = zoom_close.children('img');
        var new_img = close_img.attr('src').replace(/\.(png|gif|none)$/, '.' + to);
        close_img.attr('src', new_img);
    }

    function fixBackgroundsForIE() {
        if ($.browser.msie && parseFloat($.browser.version) >= 7) {
            switchBackgroundImagesTo('gif');
        }
    }

    function unfixBackgroundsForIE() {
        if ($.browser.msie && $.browser.version >= 7) {
            switchBackgroundImagesTo('png');
        }
    }
}