jQuery 获取屏幕高度、宽度

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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();

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