弹出式菜单css

#v_box {

width: 700px;

height: 610px;

background: #fff;

position: fixed;

top: 50%;

left: 50%;

z-index: 522222;

margin-top: -305px;

margin-left: -350px;

border-radius: 10px;

box-shadow: #333 0px 0px 20px;

}