在点击页面按钮的时候,给弹出层的div添加此样式
.showDiv {
background:
rgba(0, 0, 0, 0) radial-gradient(ellipse at center center , rgba(0, 0, 0, 0) 0px, rgba(0, 0, 0, 0.65) 100%) repeat scroll 0 0;
height:
100%;
left:
0;
overflow:
auto;
position:
fixed;
top:
0;
width:
100%;
z-index:
101;
}