var
mask
=
document.createElement("div");//js新建元素
mask.setAttribute("id",
"maskDiv");//给元素加id
mask.onclick
=
hideMask;//给元素添加点击事件
var
img
=
document.createElement("img");
img.style.float
=
"right";//js设置样式
img.src
=
"
http://520.com/images/download_android.png";
img.style.width
=
"320px";
img.style.float
=
"right";
mask.appendChild(img);
document.body.appendChild(mask);//把元素放进body标签里面