js计算滚动条高度及窗口高度

//页面位置及窗口大小
function GetPageSize() {
var scrW, scrH;
if(window.innerHeight
&& window.scrollMaxY)
{ // Mozilla
scrW =
window.innerWidth + window.scrollMaxX;
scrH = window.innerHeight +
window.scrollMaxY;
}
else if(document.body.scrollHeight >
document.body.offsetHeight)
{ // all but IE Mac
scrW =
document.body.scrollWidth;
scrH = document.body.scrollHeight;
} else
if(document.body)
{ // IE Mac
scrW = document.body.offsetWidth;

scrH = document.body.offsetHeight;
}
var winW, winH;

if(window.innerHeight)
{ // all except IE
winW =
window.innerWidth;
winH = window.innerHeight;
} else if
(document.documentElement &&
document.documentElement.clientHeight)
{ // IE 6 Strict Mode
winW =
document.documentElement.clientWidth;
winH =
document.documentElement.clientHeight;
} else if (document.body) { //
other
winW = document.body.clientWidth;
winH =
document.body.clientHeight;
} // for small pages with total size less
then the viewport
var pageW = (scrW<winW) ? winW : scrW;
var pageH =
(scrH<winH) ? winH : scrH;
return {PageW:pageW, PageH:pageH,
WinW:winW, WinH:winH};

};

//滚动条位置
function GetPageScroll()
{
var x, y;
if(window.pageYOffset)
{ // all except IE
y =
window.pageYOffset;
x = window.pageXOffset;
} else
if(document.documentElement && document.documentElement.scrollTop)

{ // IE 6 Strict
y = document.documentElement.scrollTop;
x
= document.documentElement.scrollLeft;
} else if(document.body) { // all
other IE
y = document.body.scrollTop;
x =
document.body.scrollLeft;
}
return {X:x,
Y:y};

}


jquery

获取浏览器显示区域的高度 :
$(window).height();
获取浏览器显示区域的宽度 :$(window).width();
获取页面的文档高度
:$(document).height();
获取页面的文档宽度 :$(document).width();

获取滚动条到顶部的垂直高度
:$(document).scrollTop();
获取滚动条到左边的垂直宽度 :$(document).scrollLeft();


计算元素位置和偏移量

offset方法是一个很有用的方法,它返回包装集中第一个元素的偏移信息。默认情况下是相对body的偏移信息。结果包含 top和left两个属性。

offset(options, results)
options.relativeTo  指定相对计
算偏移位置的祖先元素。这个元素应该是relative或absolute定位。省略则相对body。
options.scroll  是否把
滚动条计算在内,默认TRUE
options.padding  是否把padding计算在内,默认false
options.margin
  是否把margin计算在内,默认true
options.border  是否把边框计算在内,默认true

http://www.cnblogs.com/hoojo/archive/2012/02/16/2354663.html

alert($(window).height()); //浏览器当前窗口可视区域高度
alert($(document).height()); //浏览器当前窗口文档的高度
alert($(document.body).height());//浏览器当前窗口文档body的高度
alert($(document.body).outerHeight(true));//浏览器当前窗口文档body的总高度 包括border padding margin
alert($(window).width()); //浏览器当前窗口可视区域宽度
alert($(document).width());//浏览器当前窗口文档对象宽度
alert($(document.body).width());//浏览器当前窗口文档body的高度
alert($(document.body).outerWidth(true));//浏览器当前窗口文档body的总宽度 包括border padding margin

// 获取页面的高度、宽度
function getPageSize() {
var xScroll, yScroll;
if (window.innerHeight && window.scrollMaxY) {
xScroll = window.innerWidth + window.scrollMaxX;
yScroll = window.innerHeight + window.scrollMaxY;
} else {
if (document.body.scrollHeight > document.body.offsetHeight) { // all but Explorer Mac
xScroll = document.body.scrollWidth;
yScroll = document.body.scrollHeight;
} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
xScroll = document.body.offsetWidth;
yScroll = document.body.offsetHeight;
}
}
var windowWidth, windowHeight;
if (self.innerHeight) { // all except Explorer
if (document.documentElement.clientWidth) {
windowWidth = document.documentElement.clientWidth;
} else {
windowWidth = self.innerWidth;
}
windowHeight = self.innerHeight;
} else {
if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
windowWidth = document.documentElement.clientWidth;
windowHeight = document.documentElement.clientHeight;
} else {
if (document.body) { // other Explorers
windowWidth = document.body.clientWidth;
windowHeight = document.body.clientHeight;
}
}
}
// for small pages with total height less then height of the viewport
if (yScroll < windowHeight) {
pageHeight = windowHeight;
} else {
pageHeight = yScroll;
}
// for small pages with total width less then width of the viewport
if (xScroll < windowWidth) {
pageWidth = xScroll;
} else {
pageWidth = windowWidth;
}
arrayPageSize = new Array(pageWidth, pageHeight, windowWidth, windowHeight);
return arrayPageSize;
}

// 滚动条
document.body.scrollTop;
$(document).scrollTop();

http://loushi135.iteye.com/blog/1453462

 ///获取浏览器窗口

function findDimensions() //函数:获取尺寸

{
//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;
}
原文地址:https://www.cnblogs.com/qqyuhaitao/p/3318593.html