js/jquery는 브라우저 창의 가시 영역의 높이와 너비 및 스크롤 막대 높이 구현 코드를 얻습니다.

document.body.offsetWidth 
document.body.offsetHeight

document.documentElement.clientWidth 
document.documentElement.clientHeight

window.innerWidth 
window.innerHeight

document.body.scrollWidth 
document.body.scrollHeight

window.screen.height 
window.screen.width

function getViewSizeWithoutScrollbar(){//不包含滚动条 
return { 
width : document.documentElement.clientWidth, 
height: document.documentElement.clientHeight 
} 
} 
function getViewSizeWithScrollbar(){//包含滚动条 
if(window.innerWidth){ 
return { 
width : window.innerWidth, 
height: window.innerHeight 
} 
}else if(document.documentElement.offsetWidth == document.documentElement.clientWidth){ 
return { 
width : document.documentElement.offsetWidth, 
height: document.documentElement.offsetHeight 
} 
}else{ 
return { 
width : document.documentElement.clientWidth + getScrollWith(), 
height: document.documentElement.clientHeight + getScrollWith() 
} 
} 
}

clientWidth = width + padding 
clientHeight = height + padding 
offsetWidth = width + padding + border 
offsetHeight = height + padding + border 
IE5.0/5.5： 
clientWidth = width - border 
clientHeight = height - border 
offsetWidth = width 
offsetHeight = height

$(document).width() < $(&#39;body&#39;).width() ? $(document).width() : $(&#39;body&#39;).width(); 
$(document).height() < $(&#39;body&#39;).height() ? $(document).height() : $(&#39;body&#39;).height();