js 图片缩放特效代码

图片特效

.lightbox{width:300px;background:#FFFFFF;border:1px solid #ccc;line-height:25px; top:5%; left:5%;}
.lightbox dt{background:#f4f4f4;}

var isIE = (document.all) ? true : false;
var isIE6 = isIE && ([/MSIE (\d)\.0/i.exec(navigator.userAgent)][0][1] == 6);
var $ = function (id)
{
return "string" == typeof id ? document.getElementById(id) : id;
};
var Class =
{
create: function()
{
return function() { this.initialize.apply(this, arguments); }
}
};
var Extend = function(destination, source)
{
for (var property in source)
{
destination[property] = source[property];
}
};
var Bind = function(object, fun)
{
return function()
{
return fun.apply(object, arguments);
}
};
var Each = function(list, fun)
{
for (var i = 0, len = list.length; i '
}
},
//设置默认属性
SetOptions: function(options)
{
this.options =
{//默认值
Lay: null,//覆盖层对象
Color: "#000",//背景色
Opacity: 50,//透明度(0-100)
zIndex: 1000//层叠顺序
};
Extend(this.options, options || {});
},
//显示
Show: function()
{
//兼容ie6
if(isIE6){ this._resize(); window.attachEvent("onresize", this._resize); }
//设置样式
with(this.Lay.style)
{
//设置透明度
isIE ? filter = "alpha(opacity:" + this.Opacity + ")" : opacity = this.Opacity / 100;
backgroundColor = this.Color; display = "block";
}
},
//关闭
Close: function()
{
this.Lay.style.display = "none";
if(isIE6){ window.detachEvent("onresize", this._resize); }
}
};

var LightBox = Class.create();
LightBox.prototype =
{
initialize: function(box, options)
{
this.Box = $(box);//显示层
this.OverLay = new OverLay(options);//覆盖层
this.SetOptions(options);

this.Fixed = !!this.options.Fixed;
this.Over = !!this.options.Over;
this.Center = !!this.options.Center;
this.onShow = this.options.onShow;

this.Box.style.zIndex = this.OverLay.zIndex + 1;
this.Box.style.display = "none";
//兼容ie6用的属性
if(isIE6)
{
this._top = this._left = 0; this._select = [];
this._fixed = Bind(this, function(){ this.Center ? this.SetCenter() : this.SetFixed(); });
}
},
//设置默认属性
SetOptions: function(options)
{
this.options =
{//默认值
Over: true,//是否显示覆盖层
Fixed: false,//是否固定定位
Center: false,//是否居中
onShow: function(){}//显示时执行
};
Extend(this.options, options || {});
},
//兼容ie6的固定定位程序
SetFixed: function()
{
this.Box.style.top = document.documentElement.scrollTop - this._top + this.Box.offsetTop + "px";
this.Box.style.left = document.documentElement.scrollLeft - this._left + this.Box.offsetLeft + "px";

this._top = document.documentElement.scrollTop; this._left = document.documentElement.scrollLeft;
},
//兼容ie6的居中定位程序
SetCenter: function()
{
this.Box.style.marginTop = document.documentElement.scrollTop - this.Box.offsetHeight / 2 + "px";
this.Box.style.marginLeft = document.documentElement.scrollLeft - this.Box.offsetWidth / 2 + "px";
},
//显示
Show: function(options)
{
//固定定位
this.Box.style.position = this.Fixed && !isIE6 ? "fixed" : "absolute";
//覆盖层
this.Over && this.OverLay.Show();
this.Box.style.display = "block";
//居中
if(this.Center)
{
this.Box.style.top = this.Box.style.left = "50%";
//设置margin
if(this.Fixed)
{
this.Box.style.marginTop = - this.Box.offsetHeight / 2 + "px";
this.Box.style.marginLeft = - this.Box.offsetWidth / 2 + "px";
}else{
this.SetCenter();
}
}
//兼容ie6
if(isIE6)
{
if(!this.Over)
{
//没有覆盖层ie6需要把不在Box上的select隐藏
this._select.length = 0;
Each(document.getElementsByTagName("select"), Bind(this, function(o){
if(!Contains(this.Box, o)){ o.style.visibility = "hidden"; this._select.push(o); }
}))
}
//设置显示位置
this.Center ? this.SetCenter() : this.Fixed && this.SetFixed();
//设置定位
this.Fixed && window.attachEvent("onscroll", this._fixed);
}
this.onShow();
},
//关闭
Close: function()
{
this.Box.style.display = "none";
this.OverLay.Close();
if(isIE6)
{
window.detachEvent("onscroll", this._fixed);
Each(this._select, function(o){ o.style.visibility = "visible"; });
}
}
};
function ZoomImg(o)
{
var zoom = parseInt(o.style.zoom, 10) || 100;
zoom += event.wheelDelta / 12;
if(zoom >60&&zoom

鼠标滚轮放大图片

var box = new LightBox("idBox");
$("idBoxCancel").onclick = function(){ box.Close(); }
$("imgclose").onclick = function(){ box.Close(); }
$("iimg").onclick = function(){ box.Show(); }

[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]