測試代碼
.mask{
background: #000;
position: absolute;
left: 0px;
top: 0px;
height:100%;
width:100%;
z-index: 20;
filter: alpha(opacity=60);
opacity: 0.6;
}
.wrap{
position:absolute;
top:50%;
left:50%;
width:600px;
height:400px;
background: #FFF;
z-index:21;
}
.box {
position:absolute;
top:-50%;
left:-50%;
display:block;
width:600px;
background: #FFF;
height:400px;
z-index:40px;
}
function show(){
var alertPart=document.getElementById("alert");
alertPart.style.display="block";
}
setTimeout(function(){
show();
},1000);