javascript学习笔记之document.compatMode

转载http://www.douban.com/note/184517466/

//document.compatMode用来判断当前浏览器采用的渲染方式

//BackCompat：标准兼容模式关闭。

//CSS1Compat：标准兼容模式开启。

获取网页客户区的宽高、滚动条宽高、滚动条Left和Top的完整代码如下

if (document.compatMode == \"BackCompat\") {
cWidth = document.body.clientWidth;
cHeight = document.body.clientHeight;
sWidth = document.body.scrollWidth;
sHeight = document.body.scrollHeight;
sLeft = document.body.scrollLeft;
sTop = document.body.scrollTop;
}
else { //document.compatMode == \"CSS1Compat\"
cWidth = document.documentElement.clientWidth;
cHeight = document.documentElement.clientHeight;
sWidth = document.documentElement.scrollWidth;
sHeight = document.documentElement.scrollHeight;
sLeft = document.documentElement.scrollLeft == 0 ? document.body.scrollLeft : document.documentElement.scrollLeft;
sTop = document.documentElement.scrollTop == 0 ? document.body.scrollTop : document.documentElement.scrollTop;
}