js获取网页的高度，宽度

  var  s = "";
    s += "\r\n网页可见区域宽："+ document.body.clientWidth;
    s += "\r\n网页可见区域高："+ document.body.clientHeight;
    s += "\r\n网页可见区域宽："+ document.body.offsetWidth  +" (包括边线的宽)";
    s += "\r\n网页可见区域高："+ document.body.offsetHeight +" (包括边线的宽)";
    s += "\r\n网页正文全文宽："+ document.body.scrollWidth;
    s += "\r\n网页正文全文高："+ document.body.scrollHeight;
    s += "\r\n网页被卷去的高："+ document.body.scrollTop;
    s += "\r\n网页被卷去的左："+ document.body.scrollLeft;
    s += "\r\n网页正文部分上："+ window.screenTop;
    s += "\r\n网页正文部分左："+ window.screenLeft;
    s += "\r\n屏幕分辨率的高："+ window.screen.height;
    s += "\r\n屏幕分辨率的宽："+ window.screen.width;
    s += "\r\n屏幕可用工作区高度："+ window.screen.availHeight;
    s += "\r\n屏幕可用工作区宽度："+ window.screen.availWidth;
    alert(s);

监听屏幕高度变化

window.addEventListener("resize", function () {
// 得到屏幕尺寸 (内部/外部宽度，内部/外部高度)
    changeLogoPosition();
}, false);