自己用jQuery写了一个图片的马赛克消失效果

<h1>单击图片,产生效果</h1> 
<div class="box"></div>

; (function ($) { 
var defaults = { 
ani: 4, //动画效果.1.马赛克向中间聚拢,2.马赛克左上角聚拢,3.马赛克拉扯消失,4.原地缩小 
delay: 3000, //动画执行时间 
url:"0",//图片路径 
count: [20, 20]//马赛克水平数量,竖直方向数量;数量不能过多,否则计算量太大,计算机执行不了,导致浏览器卡死 
} 
$.fn.gysMaSaiKe = function (opt) { 
opt = $.extend({}, defaults, opt); 
if(opt.url=="0"){alert("没有填写图片路径参数");return;} 
var obj = $(this); 
if (obj.css("position") == "static") obj.css({ "position": "relative" }); 
obj.css("overflow","hidden"); 
var objWidth = obj.width(); 
var objHeight = obj.height(); 
(function (count,url, obj) { 
var littleBoxWidth = Math.floor(objWidth / count[0]); 
var littleBoxHeight = Math.floor(objHeight / count[1]); 
var html = ""; 
var littleBoxLeft = littleBoxWidth * (-1), littleBoxTop = littleBoxHeight * (-1); 

for (var i = 0; i < count[1]; i++) {//行 
littleBoxTop += littleBoxHeight; 
for (var j = 0; j < count[0]; j++) {//每一行中的单个span 
littleBoxLeft += littleBoxWidth; 
html += "<span style='display:block;position:absolute;left:" + littleBoxLeft + "px;top:" + littleBoxTop + "px;width:" + littleBoxWidth + "px; height:" + littleBoxHeight + "px; background-image:url("+url+");background-position:" + (littleBoxLeft) * (-1) + "px " + (littleBoxTop) * (-1) + "px;'></span>"; 
} 
littleBoxLeft = littleBoxWidth * (-1); 
} 
obj.html(html); 
})(opt.count,opt.url,obj); 

var animation = function (ani, delay, objs) { 
var res = function () { } 
if (ani == 1) {//马赛克向中间聚拢 
res = function () { 
objs.animate({ top: objHeight / 2, left: objWidth / 2, opacity: 0 }, delay); 
setTimeout(function(){obj.html("");},delay); 
} 
} 
else if (ani == 2) {//碎片向左上角聚拢消失 
res = function () { 
objs.animate({ left: 0, top: 0, opacity: 0 }, delay); setTimeout(function () { obj.html(""); }, delay); 
} 
} 
else if (ani == 3) {//拉扯消失 
res = function () { 
objs.filter(":even").animate({top:-100,left:-100},delay); 
objs.filter(":odd").animate({ top: -100, left:900}, delay); setTimeout(function(){obj.html("");},delay); 
} 
} 
else if (ani == 4) {// 
res = function () { objs.animate({ height: 0, width: 0 }, delay);setTimeout(function(){obj.html("");},delay); } 
} 
else { 
res = function () { objs.animate({ height: 0, width: 0 }, delay);setTimeout(function(){obj.html("");},delay); } 
} 
return res; 
} (opt.ani, opt.delay, obj.children()); 

obj.on("click", "span", animation); 
} 
})(jQuery);

.box { width: 1000px; height:600px;}

$(function () { 
$(".box").gysMaSaiKe({ 
count: [10, 15], //马赛克水平数量,竖直方向数量;数量不能过多,否则计算量太大,计算机执行不了,导致浏览器卡死 
ani: 4, //动画效果.1.马赛克向中间聚拢,2.马赛克左上角聚拢,3.马赛克拉扯消失,4.原地缩小 
delay: 5000, //动画执行时间 
url: "1.jpg" //图片路径 
}); 
});