封装的原生javascript弹出层代码

<script type="text/javascript">// <![CDATA[ 
/* @author: hongru.chen 
** @date: 2010-09-15 
** @vision: 1.1 
*/ 
var Hongru = {}; 
function $(id){return document.getElementById(id)} 
Object.prototype.extend = function(target, /*optional*/source, /*optional*/deep) { 
target = target || {}; 
var sType = typeof source, i = 1, options; 
if( sType === 'undefined' || sType === 'boolean' ) { 
deep = sType === 'boolean' ? source : false; 
source = target; 
target = this; 
} 
if( typeof source !== 'object' && Object.prototype.toString.call(source).call(source) !== '[object Function]' ) 
source = {}; 

while(i <= 2) { 
options = i === 1 ? target : source; 
if( options != null ) { 
for( var name in options ) { 
var src = target[name], copy = options[name]; 
if(target === copy) 
continue; 
if(deep && copy && typeof copy === 'object' && !copy.nodeType) 
target[name] = this.extend(src || 
(copy.length != null ? [] : {}), copy, deep); 
else if(copy !== undefined) 
target[name] = copy; 
} 
} 
i++; 
} 
return target; 
}; 
isFunction = function( fn ) { 
return !!fn && typeof fn != "string" && !fn.nodeName && 
fn.constructor != Array && /^[\s[]?function/.test( fn + "" ); 
} 
Hongru.box = function(){ 
var box,mask,content,_content,_height,_width,isPreload,flag = false; 

return{ 
open:function(con,options){ 
//default options 
var defaultOptions = { 
width:300, 
height:200, 
isPre:true, 
time:0, 
title:'对话框', 
isBar:true, 
isShut:true 
}; 
options = options?options:{}; 
options = Object.extend(defaultOptions,options); 

if(!flag){ 
box = document.createElement('div');box.id = "popup-box"; 
box.style.cssText = "position:absolute; display:none; background:#fff url(preload.gif) no-repeat 50% 50%; border:5px solid #ccc; z-index:2000"; 
mask = document.createElement('div');mask.id = "popup-mask"; 
mask.style.cssText = "position:absolute; display:none; top:0; left:0; height:100%; width:100%; background:#000; z-index:1500"; 
content = document.createElement('div');content.id = "popup-content"; 
content.style.cssText = "background:#fff"; 
bar = document.createElement('div'); bar.id = "popup-bar"; 
bar.style.cssText = "background:none repeat scroll 0 0 #F7F7F7;border-bottom:4px solid #EEEEEE;border-top:3px solid #F9F9F9;margin-top:2px;position:relative"; 
wrapTit = document.createElement('div'); wrapTit.id = "wrap-tit"; 
wrapTit.style.cssText = "background:none repeat scroll 0 0 #F3F3F3;border-bottom:5px solid #F1F1F1;border-top:4px solid #F5F5F5;line-height:5px;margin-top:3px;"; 
tit = document.createElement('span'); tit.id = "popup-tit"; 
tit.style.cssText = "cursor:text;margin-left:10px;position:relative;color:#333;font-size:84%" 

shut = document.createElement('a'); shut.id = "popup-shut"; 
shut.innerHTML = '×'; 
shut.style.cssText = "color:#34538B;cursor:pointer;font-family:Tahoma;font-weight:bold;position:absolute;top:0px;right:10px;text-decoration:none;"; 
document.body.appendChild(mask); document.body.appendChild(box); box.appendChild(bar); box.appendChild(content); bar.appendChild(wrapTit); bar.appendChild(shut); wrapTit.appendChild(tit); 
mask.onclick = shut.onclick = Hongru.box.hide; 
//bar.onclick = function(){alert($('sure').id)} 

window.onresize = Hongru.box.resize; 
flag = true; 
}tit.innerHTML = options.title; 
options.isShut?shut.style.display = '':shut.style.display = 'none'; 
options.isBar?bar.style.display = '':bar.style.display = 'none'; 
if(!options.isPre){ 
box.style.width = options.width?options.width+'px':'auto'; 
box.style.height = options.height?options.height+'px':'auto'; 
box.style.backgroundImage = 'none'; 
content.innerHTML = con; 
} 
else{ 
content.style.display = 'none'; 
box.style.width = box.style.height = '100px'; 
} 
this.mask(); 
this.alpha(mask,1,50); 
_content = con; _height = options.height; _width = options.width; isPreload = options.isPre; 
if(options.time){ 
setTimeout(function(){Hongru.box.hide()},1000*options.time); 
} 
}, 

fill:function(con,options){ 
if(options.isPre){ 
if(!options.width || !options.height){ 
var autoWidth = box.style.width, autoHeight = box.style.height; 
content.innerHTML = con; 
box.style.width = options.width?options.width+'px':''; 
box.style.height = options.height?options.height+'px':''; 
content.style.display = ''; 
options.width = parseInt(box.offsetWidth-10); 
options.height = parseInt(box.offsetHeight-10); 
content.style.display = 'none'; 
box.style.width = autoWidth; 
box.style.height = autoHeight; 
} 
else{ 
content.innerHTML = con; 

} 
this.size(box,options.width,options.height); 
} 
else{ 
box.style.backgroundImage = 'none'; 
} 
}, 

hide:function(){ 
Hongru.box.alpha(box,-1,0); 
}, 

resize:function(){ 
Hongru.box.pos(); 
Hongru.box.mask(); 
}, 

mask:function(){ 
mask.style.height = Hongru.page.total(1)+'px'; 
mask.style.width=''; mask.style.width = Hongru.page.total(0)+'px'; 
}, 

pos:function(){ 
var minTop = (Hongru.page.height()/2)-(box.offsetHeight/2); minTop = minTop<10?10:minTop; 
box.style.top=(minTop+Hongru.page.top())+'px'; 
box.style.left=(Hongru.page.width()/2)-(box.offsetWidth/2)+'px'; 
}, 

alpha:function(obj,direction,destination){ 
clearInterval(obj.animing); 
if(direction == 1){ 
obj.style.opacity=0; obj.style.filter='alpha(opacity=0)'; 
obj.style.display='block'; this.pos(); 
} 
obj.animing = setInterval(function(){Hongru.box.alphaAnim(obj,destination,direction)},50); 
}, 

alphaAnim:function(obj,destination,direction){ 
var opacity = Math.round(obj.style.opacity*100); 
if(opacity == destination){ 
clearInterval(obj.animing); 
if(direction == -1){ 
obj.style.display='none'; 
obj == box?Hongru.box.alpha(mask,-1,0):content.innerHTML=box.style.backgroundImage=''; 
}else{ 
curOptions = {width:_width,height:_height,isPre:isPreload} 
obj == mask?this.alpha(box,1,100):Hongru.box.fill(_content,curOptions); 
} 
}else{ 
var n=Math.ceil((opacity+((destination-opacity)*.5))); n=n==1?0:n; 
obj.style.opacity=n/100; 
obj.style.filter='alpha(opacity='+n+')'; 
} 
}, 

size:function(obj,width,height){ 
obj = typeof obj == 'object' ? obj : $(obj); 
clearInterval(obj.sizing); 
var offsetW = obj.offsetWidth, offsetH = obj.offsetHeight, 
otherW = offsetW-parseInt(obj.style.width), otherH = offsetH-parseInt(obj.style.height); 
var wFlag = (offsetW-otherW>width)?0:1, hFlag = (offsetH-otherH>height)?0:1; 
obj.sizing = setInterval(function(){Hongru.box.sizeAnim(obj,width,otherW,wFlag,height,otherH,hFlag)},20); 
}, 

sizeAnim:function(obj,width,otherW,wFlag,height,otherH,hFlag){ 
var objW = obj.offsetWidth-otherW, objH = obj.offsetHeight-otherH; 
if(objW == width && objH == height){ 
clearInterval(obj.sizing); 
box.style.backgroundImage='none'; 
content.style.display='block'; 
}else{ 
if(objW!=width){ 
var n = objW+((width-objW)*.5); 
obj.style.width = wFlag?Math.ceil(n)+'px':Math.floor(n)+'px'; 
} 
if(objH!=height){ 
var n = objH+((height-objH)*.5); 
obj.style.height = hFlag?Math.ceil(n)+'px':Math.floor(n)+'px'; 
} 
this.pos(); 

} 
}, 

ask:function(message,options,sureCall,cancelCall){ 
var elements = '<div class="wrap-remind" style="text-align:center">'+message+'<p><button id="sure-btn" class="sure-btn">确认</button>  <button id="cancel-btn" class="cancel-btn">取消</button></p></div>'; 
Hongru.box.open(elements,options); 

function delay(){//回调 
if(($('sure-btn') && $('cancel-btn')) != null){ 
clearInterval(checkComplete); 
//alert('yes'); 
$('sure-btn').onclick = function(){ 
if(isFunction(sureCall)){sureCall.call(this);} 
} 
$('cancel-btn').onclick = function(){ 
if(isFunction(cancelCall)){cancelCall.call(this);} 
Hongru.box.hide(); 
} 
}} 
var checkComplete = setInterval(delay,100); 
} 
} 
}(); 
Hongru.page=function(){ 
return{ 
top:function(){return document.documentElement.scrollTop||document.body.scrollTop}, 
width:function(){return self.innerWidth||document.documentElement.clientWidth||document.body.clientWidth}, 
height:function(){return self.innerHeight||document.documentElement.clientHeight||document.body.clientHeight}, 
total:function(d){ 
var b=document.body, e=document.documentElement; 
return d?Math.max(Math.max(b.scrollHeight,e.scrollHeight),Math.max(b.clientHeight,e.clientHeight)): 
Math.max(Math.max(b.scrollWidth,e.scrollWidth),Math.max(b.clientWidth,e.clientWidth)) 
} 
} 
}(); 
// ]]></script>

不设任何options参数的box（默认高200px，宽300px）
普通设定高宽的box
高宽自适应内容高宽的box
不带预载动画的box
延迟自动消失的box
title自定义的box
不带标题栏的的box
不带标题栏关闭按钮的box
带按钮和回调参数的box

调用 Hongru.box.open(con,options)函数，参数con为弹出层主要内容，可以是html代码。options为一个object，可选参数目前有

{ 
width:300 //自定义，弹出层主体（除边框和标题栏的宽度），为0时自适应。 
height:200//自定义，弹出层主体（除边框和标题栏的高度），为0时自适应。 
isPre:1 //true or false,是否有预加载背景图， 
time:0 //延迟自动关闭时间，秒为单位，0时不触发 
title:'' //自定义title 
isBar:1 //true or false,是否有标题栏 
isShut:1 //是否有关闭按钮 
}

另 Hongru.box.ask(con,options,surecall,cancelcall)为带按钮的提示框，带回调函数前两个参数同上，后两个参数分别为‘确认'和‘取消'的回调函数
其中加入了透明度渐变和大小渐变，透明度渐变主体函数如下：

show sourceview sourceprint?alphaAnim:function(obj,destination,direction){ 
var opacity = Math.round(obj.style.opacity*100); 
if(opacity == destination){ 
clearInterval(obj.animing); 
if(direction == -1){ 
obj.style.display='none'; 
obj == box?Hongru.box.alpha(mask,-1,0):content.innerHTML=box.style.backgroundImage=''; 
}else{ 
curOptions = {width:_width,height:_height,isPre:isPreload} 
obj == mask?this.alpha(box,1,100):Hongru.box.fill(_content,curOptions); 
} 
}else{ 
var n=Math.ceil((opacity+((destination-opacity)*.5))); n=n==1?0:n; 
obj.style.opacity=n/100; 
obj.style.filter='alpha(opacity='+n+')'; 
} 
},

box大小渐变函数体如下：

show sourceview sourceprint?sizeAnim:function(obj,width,otherW,wFlag,height,otherH,hFlag){ 
var objW = obj.offsetWidth-otherW, objH = obj.offsetHeight-otherH; 
if(objW == width && objH == height){ 
clearInterval(obj.sizing); 
box.style.backgroundImage='none'; 
content.style.display='block'; 
}else{ 
if(objW!=width){ 
var n = objW+((width-objW)*.5); 
obj.style.width = wFlag?Math.ceil(n)+'px':Math.floor(n)+'px'; 
} 
if(objH!=height){ 
var n = objH+((height-objH)*.5); 
obj.style.height = hFlag?Math.ceil(n)+'px':Math.floor(n)+'px'; 
} 
this.pos(); 
} 
},

好了，废话不多说了，附上源文件打包下载：狠狠点击这里
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