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【转载】Javascript获取各种浏览器看得出窗口大小

2012-09-07 
【转载】Javascript获取各种浏览器可见窗口大小呼呼,搞了大半天,总算弄明白了为何用document.body.clientHei

【转载】Javascript获取各种浏览器可见窗口大小

呼呼,搞了大半天,总算弄明白了为何用document.body.clientHeight,document.body.offsetHeight都没有办法获取网页可见区域的正确值,原来罪魁祸首是W3C定义的标准!!在新定义出来的标准下document.documentElement.clientHeight在IE和火狐里都能获取正确值,下面一篇文章详细介绍了获取各种浏览器可见窗口大小这方面的差别:

<script>
function getInfo()
{
??? var s ="";
??? s += "网页可见区域宽:"+ document.body.clientWidth;
??? s += "网页可见区域高:"+ document.body.clientHeight;
??? s += "网页可见区域宽:"+ document.body.offsetWidth + "(包括边线和滚动条的宽)";
??? s += "网页可见区域高:"+ document.body.offsetHeight + "(包括边线的宽)";
??? s += "网页正文全文宽:"+ document.body.scrollWidth;
??? s += "网页正文全文高:"+ document.body.scrollHeight;
??? s += "网页被卷去的高(ff):"+ document.body.scrollTop;
??? s += "网页被卷去的高(ie):"+document.documentElement.scrollTop;
??? s += "网页被卷去的左:"+ document.body.scrollLeft;
??? s += "网页正文部分上:"+ window.screenTop;
??? s += "网页正文部分左:"+ window.screenLeft;
??? s += "屏幕分辨率的高:"+ window.screen.height;
??? s += "屏幕分辨率的宽:"+ window.screen.width;
??? s += "屏幕可用工作区高度:"+ window.screen.availHeight;
??? s += "屏幕可用工作区宽度:"+ window.screen.availWidth;
??? s += "你的屏幕设置是 "+ window.screen.colorDepth +"位彩色";
??? s += "你的屏幕设置 "+ window.screen.deviceXDPI +"像素/英寸";
??? //alert(s);
}
getInfo();
</script>
在我本地测试当中:
在IE、FireFox、Opera下都可以使用
document.body.clientWidth
document.body.clientHeight
即可获得,很简单,很方便。
而在公司项目当中:
Opera仍然使用
document.body.clientWidth
document.body.clientHeight
可是IE和FireFox则使用
document.documentElement.clientWidth
document.documentElement.clientHeight
原来是W3C的标准在作怪啊
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
如果在页面中添加这行标记的话

在IE中:
document.body.clientWidth ==> BODY对象宽度
document.body.clientHeight ==>BODY对象高度
document.documentElement.clientWidth ==>可见区域宽度
document.documentElement.clientHeight ==>可见区域高度
在FireFox中:
document.body.clientWidth ==> BODY对象宽度
document.body.clientHeight ==>BODY对象高度
document.documentElement.clientWidth ==>可见区域宽度
document.documentElement.clientHeight ==>可见区域高度
?
在Opera中:
document.body.clientWidth ==>可见区域宽度
document.body.clientHeight ==>可见区域高度
document.documentElement.clientWidth ==>页面对象宽度(即BODY对象宽度加上Margin宽)
document.documentElement.clientHeight ==>页面对象高度(即BODY对象高度加上Margin高)
而如果没有定义W3C的标准,则
IE为:
document.documentElement.clientWidth ==> 0
document.documentElement.clientHeight ==> 0
FireFox为:
document.documentElement.clientWidth ==>页面对象宽度(即BODY对象宽度加上Margin宽)document.documentElement.clientHeight==>页面对象高度(即BODY对象高度加上Margin高)
Opera为:
document.documentElement.clientWidth ==>页面对象宽度(即BODY对象宽度加上Margin宽)document.documentElement.clientHeight==>页面对象高度(即BODY对象高度加上Margin高)

原文地址:http://www.css88.com/article.asp?id=133

判断浏览器的类型:
var ua =navigator.userAgent.toLowerCase ();
var os = new Object();
os.isFirefox = ua.indexOf ("gecko") != -1;
os.isOpera = ua.indexOf ("opera") != -1;
os.isIE = !os.isOpera && ua.indexOf("msie") != -1;

获取浏览器区域的大小://
// getPageScroll()
// Returns array with x,y page scroll values.
// Core code from - quirksmode.org
//
function getPageScroll(){

?var yScroll;?if (self.pageYOffset) {
??yScroll =self.pageYOffset;
?} else if (document.documentElement&&document.documentElement.scrollTop){? // Explorer6 Strict
??yScroll =document.documentElement.scrollTop;
?} else if (document.body) {// all otherExplorers
??yScroll =document.body.scrollTop;
?}?arrayPageScroll = newArray('',yScroll)
?return arrayPageScroll;
}?//
// getPageSize()
// Returns array with page width, height and window width,height
// Core code from - quirksmode.org
// Edit for Firefox by pHaez
//
function getPageSize(){
?
?var xScroll, yScroll;
?
?if (windows.innerHeight&& window.scrollMaxY){?
??xScroll =document.body.scrollWidth;
??yScroll = windows.innerHeight +window.scrollMaxY;
?} else if (document.body.scrollHeight> document.body.offsetHeight){ // all but ExplorerMac
??xScroll =document.body.scrollWidth;
??yScroll =document.body.scrollHeight;
?} else { // Explorer Mac...would also work inExplorer 6 Strict, Mozilla and Safari
??xScroll =document.body.offsetWidth;
??yScroll =document.body.offsetHeight;
?}
?
?var windowWidth, windowHeight;
?if (self.innerHeight) {?// allexcept Explorer
??windowWidth =self.innerWidth;
??windowHeight =self.innerHeight;
?} else if (document.documentElement&&document.documentElement.clientHeight) { // Explorer 6 StrictMode
??windowWidth =document.documentElement.clientWidth;
??windowHeight =document.documentElement.clientHeight;
?} else if (document.body) { // otherExplorers
??windowWidth =document.body.clientWidth;
??windowHeight =document.body.clientHeight;
?}?
?
?// for small pages with total height less thenheight of the viewport
?if(yScroll < windowHeight){
??pageHeight =windowHeight;
?} else {
??pageHeight = yScroll;
?}?// for small pages with total width lessthen width of the viewport
?if(xScroll <windowWidth){?
??pageWidth = windowWidth;
?} else {
??pageWidth = xScroll;
?}
?arrayPageSize = newArray(pageWidth,pageHeight,windowWidth,windowHeight)
?return arrayPageSize;
}原文地址:http://dakular.spaces.live.com/Blog/cns!8668FFEC49BC51CE!440.entry

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