(function($){
$.fn.fancyZoom = function(options){

	var options   = options || {};
	var directory = options && options.directory ? options.directory : 'images';
	var zooming   = false;
	var zoom_image = options && options.zoom_image ? options.zoom_image : 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 href = $(this).attr('href');
			var content_div = (zoom_image ? null : $(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 image = (zoom_image ? new Image() : null);
			if(image){
				image.src = href;
				image.alt = this.title;
			}
			
			var width = 0;
			if(zoom_width){
				width = zoom_width;
			}else if(content_div){
				width = content_div.width();
			}else if(image){
				width = image.width;
			}
			width += 60;
			
			var height = 0;
			if(zoom_height){
				height = zoom_height;
			}else if(content_div){
				height = content_div.height();
			}else if(image){
				height = image.height;
			}
			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(image){
				zoom_content.html(image);
				zoom_content.append('<p>' + image.alt + '</p>');
				$('#zoom_content img').css('width', '100%');
			}else 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;
			}); // i adde dthis semicolon.
			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);