jquery 图片 上一张 下一张 链接效果（续篇）

/*
* imageupdown 1.0
* Copyright (c) 2009
* Date: 2010-04-20
* 图片移动上一张 下一张特效
*/
(function($){
$.fn.imageupdown = function(options){
var defaults = {
upCursor:"pre.cur",
upTitle:"点击查看上一张",
upUrl:$(this).attr('left'),
downCursor:"next.cur",
downTitle:"点击查看下一张",
downUrl:$(this).attr('right')
}
var options = $.extend(defaults, options);
this.each(function(){
var thisImage=$(this);
$(thisImage).bind("mousemove",function(e){
var positionX=e.originalEvent.x||e.originalEvent.layerX||0;
if(positionX<=$(this).width()/2){
this.style.cursor='url('+options.upCursor+'),auto';
$(this).attr('title',''+options.upTitle+'');
$(this).parent().attr('href',''+options.upUrl+'');
}else{
this.style.cursor=''+options.downCursor+'';
$(this).attr('title',''+options.downTitle+'');
$(this).parent().attr('href',''+options.downUrl+'');
}
});
});
};
})(jQuery);

<script type="text/javascript">
$(document).ready(function() {
$(".rootclass").imageupdown();
});
</script>