// 获取窗口宽度

if

(window.innerWidth)

winWidth = window.innerWidth;

else

if

((document.body) && (document.body.clientWidth))

winWidth = document.body.clientWidth;

// 获取窗口高度

if

(window.innerHeight)

winHeight = window.innerHeight;

else

if

((document.body) && (document.body.clientHeight))

winHeight = document.body.clientHeight;

// 通过深入 Document 内部对 body 进行检测，获取窗口大小

if

(document.documentElement && document.documentElement.clientHeight && document.documentElement.clientWidth)

{

winHeight = document.documentElement.clientHeight;

winWidth = document.documentElement.clientWidth;

}