自写图片遮罩层放大功能jquery插件源代码，photobox.js 1.0版，不兼容IE6

阿嚏~~~

话说本屌丝没啥开发插件的经验，可是天公不作美，公司须要让我自己开发个图片放大的插件

但公司老大的话，宛如吾皇之圣旨，微臣必当肝脑涂地，莫敢不从啊~~~

于是乎，作为一个超级小白，本人仅仅能瞎研究了，幸好黑天不负屌丝人，本屌丝最终搞出来了，尽管不尽善尽美，可是功能还是能够用的啦

先附上源代码，求各种大神指导：

/*******************************
 * photobox跨浏览器兼容插件 v1.0（不支持IE6）
 * 格式：<a href="big.jpg" id="b1" title="我就是一坨屎，你来咬我啊！"><img src="small.jpg"></a>///$("#b1").photobox();
 *******************************/
;(function($){
    $.fn.photobox = function(options){
var opts = $.extend({}, $.fn.photobox.defaults, options);//整合參数
return this.each(function(){
$(this).click(function(){
if(opts.showshadow){//假设设置显示阴影遮罩层，则显示
$.fn.photobox.shadow(opts.shadowOptions);
}
if(opts.showbox){//假设设置显示图片边框，则显示
$.fn.photobox.box();
}
if(opts.showclosebtn){//假设设置显示关闭button，则显示
$.fn.photobox.closebtn();
}
var $this = $(this);
var imgSrc = $this.attr("href");
var title = $this.attr("title");
var bigImg = new Image();//用js来获取图片高度和宽度
bigImg.src = imgSrc;
var h = bigImg.height;
var w = bigImg.width;
var $bigphoto = $('<img src="'+imgSrc+'" rel="photobox">');
var wh = $(window).height();
var ww = $(window).width();
$bigphoto.css({
"width":"0px" ,
"height":"0px",
"z-index":"10000",
"opacity":0
});
$("#pb_box").append($bigphoto);
if(opts.showtitle){//显示title
$.fn.photobox.title(title);
}//大家一起show
$("#boxshadow").stop(true).fadeIn(opts.speed);
var title_h = 0;
title_h = opts.showtitle ? 20 : 0 ;
$("#pb_box").stop(true).animate({
"width":w+"px",
"height":h+title_h+"px",
"top":parseInt((wh-h-title_h)/2)+"px",
"left":parseInt((ww-w)/2)+"px",
"opacity":1
},opts.speed);
if(opts.showclosebtn){
$("#pb_closebtn").stop(true).animate({
"width":"31px",
"height":"32px",
"opacity":1
},opts.speed);
}
$bigphoto.stop(true).animate({
"width":w+"px",
"height":h+"px",
"opacity":1
},opts.speed);
if(opts.showtitle){
$("#pb_phototitle").stop(true).animate({
"height":"20px",
"width":w+"px",
"opacity":1
},opts.speed);
}
$.fn.photobox.close();
$.fn.photobox.resize();
return false;//防止a标签跳转
});
});
    };
$.fn.photobox.shadow = function(options){//加入背景阴影遮罩层
var shadowOptions = {"width":"100%","height":"100%","position":"fixed","top":"0","left":"0","display":"none"};
var $boxshadow=$('<div></div>');
$boxshadow.attr({"id":"boxshadow"});
$boxshadow.css(shadowOptions);
$boxshadow.css(options);
$("body").append($boxshadow);
};
$.fn.photobox.box = function(){
var wh = $(window).height();
var ww = $(window).width();
var $box = $('<div></div>');//包裹图片的div
$box.attr({"id":"pb_box"});
$box.css({"background-color": "#fff","padding": "10px","position": "fixed","opacity": "0","width": "0px","height":" 0px","top": parseInt(wh/2)+"px","left":parseInt(ww/2)+"px","z-index":10000});
$("body").append($box);
};
$.fn.photobox.closebtn = function(){//图片关闭button
var $close = $('<a></a>');//关闭button
$close.attr({"id":"pb_closebtn"});
$close.css({"background": "url('css/web/images/close.png')","position": "absolute","opacity": "0","width": "0px","height":" 0px","top": "-15px","right":"-15px","z-index":10000});
$("#pb_box").append($close);
};
$.fn.photobox.title = function(title){
var $title = $('<span></span>');//图片title
$title.attr({"id":"pb_phototitle"});
$title.css({"line-height":"20px","color":"#1e2024","text-align":"center"});
$title.html(title);
$("img[rel='photobox']").after($title);
};
$.fn.photobox.close = function(){
$("#boxshadow,#pb_closebtn").click(function(){
var wh = $(window).height();
var ww = $(window).width();
$("#boxshadow").fadeOut($.fn.photobox.defaults.speed,function(){
$(this).remove();
});
$("#pb_box").animate({
"width":"20px",
"height":"20px",
"top":parseInt(wh/2)+"px",
"left":parseInt(ww/2)+"px",
"opacity":0
},$.fn.photobox.defaults.speed,function(){
$(this).remove();
});
$("img[rel='photobox']").animate({
"width":"0px",
"height":"0px",
"opacity":0
},$.fn.photobox.defaults.speed,function(){
$(this).remove();
});
if(opts.showclosebtn){//假设设置显示关闭button
$("#pb_closebtn").stop(true).animate({
"width":"0px",
"height":"0px",
"opacity":0
},$.fn.photobox.defaults.speed,function(){
$(this).remove();
});
}
if(opts.showtitle){
$("#pb_phototitle").stop(true).animate({
"height":"0px",
"width":"0px",
"opacity":0
},$.fn.photobox.defaults.speed,function(){
$(this).remove();
});
}
});
};$.fn.photobox.resize = function(){
$(window).resize(function(){
if($("body").has($("#pb_box"))){
var wh = $(window).height();
var ww = $(window).width();
var h = $("#pb_box").height();
var w = $("#pb_box").width();
$("#pb_box").stop(true).animate({
'top':(wh-h)/2 +'px',
'left':(ww-w)/2 +'px'
},100);
}
});
};$.fn.photobox.defaults = {
showclosebtn:true,
showtitle:true,
speed:400,
//下面參数临时不同意用户改动
showshadow:true,
showbox:true,
showoverlay:true,//此功能暂未开放
shadowOptions:{ "background-color": "#000", "opacity": 0.6 , "z-index": 9999},//遮罩层的zIndex要小于图片层的zIndex
autoresize:true
};
})(jQuery);