网易,佳人有约登录效果
我们先把上面拆解出来的功能完成!
1。透明层(显示与隐藏)
关键是要同时设置下面这几个样式,才能使主流浏览器上都现实透明的效果。
filter= 'Alpha(Opacity=50)';
MozOpacity ='0.5';
opacity='0.5';
可能很多人都知道,类似这种在透明层上现实东西的效果,多源至于一个称为lightbox的效果。这里我也这样命名:
function Lightbox(id)
{
this.box = this.createBox();
this.id = id||'lightbox_id';
}
Lightbox.prototype=
{
createBox:function(){
var box = document.getElementById(this.id)||document.createElement('div');
box.id = box.id||this.id;
with(box.style){
position='absolute';
left='0';
top='0';
width='100%';
height='100%';
zIndex='1000';
background='#ccc';
filter= 'Alpha(Opacity=50)';
MozOpacity ='0.5';
opacity='0.5';
display='none';
}
document.body.appendChild(box);
return box;
},
show:function(){
this.box.style.height= document.documentElement.scrollHeight+'px';
this.box.style.display = '';
},
hide:function(){
this.box.style.display = 'none';
}
}
2。表单提交(ajax或iframe)
迅雷上的是用的iframe,我们这里先说iframe
iframe就简单多了,form的target属性设置为某个iframe的name就可以了。设置iframe的onload属性,那么当表单提交完成以后他就会执行相应处理。

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