jQuery.fn.fancyZoom = function(options){

  var options   = options || {};
  var directory = options && options.directory ? options.directory : 'images/zoom';
  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'); 
	}
  }
}