js如何获取屏幕高度

js获取屏幕高度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："+ document.body.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";