(function($){
$.fn.fancyZoom = function(options){
  var options   = options || {};
  var directory = options && options.directory ? options.directory : '/libraries/jquery/fancyzoom/images';
  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 (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;
    });
    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'); }}
}
})(jQuery);