JS浏览器获取宽高

screen.availHeight

is
the height the browser's window can have if it is maximized. (including all the window decoration of the browser like the status bar, menu bars and title bar)

$(window).height()

is
the height of the viewport that shows the website. (excluding your toolbars and status bar and stuff like this)

$(document).height()

is
the height of your document shown in the viewport. If it is higher than

$(window).height()

you
get the scrollbars to scroll the document.

网页可见区域宽：document.body.clientWidth

网页可见区域高：document.body.clientHeight (html下获取浏览器高度，xhtml下获取元素总高度)

网页可见区域高：document.documentElement.clientHeight (xhtml下获取浏览器高度)

网页可见区域宽：document.body.offsetWidth (包括边线的宽)

网页可见区域高：document.body.offsetHeight (包括边线的宽)

网页正文全文宽：document.body.scrollWidth

网页正文全文高：document.body.scrollHeight

网页被卷去的高：document.body.scrollTop

网页被卷去的左：document.body.scrollLeft

网页正文部分上：window.screenTop

网页正文部分左：window.screenLeft

屏幕分辨率的高：window.screen.height

屏幕分辨率的宽：window.screen.width

屏幕可用工作区高度：window.screen.availHeight

屏幕可用工作区宽度：window.screen.availWidth