JQUERY fade效果

JQUERY fade效果求助
下了个JQUERY的插件,对JQUERY了解不多.麻烦高手帮忙看下
是一个FADE效果的插件,如何给img添加链接而不影响其fade的效果,测试了好一会,加了链接之后他的fade效果就没有了.
Html代码-----------------------------------------------

<script type="text/javascript">  

$().ready(function() {

	$('.jfade_image').jfade();

	$('.portfolio').jfade({

		start_opacity: ".4",

		high_opacity: "1",

		low_opacity: ".2",

		timing: "500"

	});

	   

});  

</script>

	<div id="wrapper">

		<div id="images">

			<a href="/"><img src="images/card02.jpg" border="0" class="jfade_image"/></a>

			<img src="images/card04.jpg" class="jfade_image"/>

			<img src="images/card09.jpg" class="jfade_image"/>

			<img src="images/card13.jpg" class="jfade_image"/>

			<img src="images/card14.jpg" class="jfade_image"/>

			<img src="images/card15.jpg" class="jfade_image"/>

			<img src="images/card16.jpg" class="jfade_image"/>

			<img src="images/card17.jpg" class="jfade_image"/>		</div>

	</div>

CSS代码-----------------------------------------------

body { background: #000000; }

#wrapper{margin: 0 auto; width: 900px;}

#images {margin: 0 auto; width: 600px; height: 220px; float:none; margin-bottom: 20px;-moz-border-radius: 5px;-webkit-border-radius: 5px;border:1px solid rgba(200,200,200,0.4);}

.jfade_image, .portfolio {width: 120px; margin: 15px; float:left;}



  

JS文件代码-----------------------------------------------

$(function($) {

	$.fn.jfade = function(settings) {

	var defaults = {

		start_opacity: "1",

		high_opacity: "1",

		low_opacity: ".1",

		timing: "500"

	};

	var settings = $.extend(defaults, settings);

	settings.element = $(this);

			

	//set opacity to start

	$(settings.element).css("opacity",settings.start_opacity);

	//mouse over

	$(settings.element).hover(

	

		//mouse in

		function () {												  

			$(this).stop().animate({opacity: settings.high_opacity}, settings.timing); //100% opacity for hovered object

			$(this).siblings().stop().animate({opacity: settings.low_opacity}, settings.timing); //dimmed opacity for other objects

		},

		//mouse out

		function () {

			$(this).stop().animate({opacity: settings.start_opacity}, settings.timing); //return hovered object to start opacity

			$(this).siblings().stop().animate({opacity: settings.start_opacity}, settings.timing); // return other objects to start opacity

		}

	);

	return this;

	}

	

})(jQuery);