window.pageYOffset与window.scrollY什么时候不相等？

var scrollTop = document.documentElement.scrollTop||document.body.scrollTop||window.pageYOffset||window.scrollY;alert(scrollTop) 结果仍然为0,为什么会这样呢...

The pageYOffset property is an alias for the scrollY property: window.pageYOffset == window.scrollY; // always true For cross-browser compatibility, use...

window.onscroll = function (){ alert(window.pageYOffset);  // have also tested with window.scrollY } And, as expected, I get my alerts once scr...

window.pageYOffset 同 window.scrollY ,其记录网页在滚动条的垂直方向位移量。 举例如下 function run() { window.scrollBy(300, 300); var s1 = document....

pageYOffset是window对象,适用于FF,chrome,IE9+,opera等多浏览器支持(其实是针对ie8和ie9之下的ie)同时 忽略Doctype 定义规则,也即是DTD说明。 ...

window.scrollY 属于window对象,firefox、chrome,opera支持,IE不支持,忽略Doctype...var scrollTop = window.pageYOffset || document.documentElement.scrollTop ||...

the pageYOffset property of the window object is supported in all browsers ...object.scrollY; You can find the related objects in the Supported by ...

window.scrollX: 左滚动值 window.scrollY: 上滚动值 window.pageXOffset: 左滚动值 window.pageYOffset: 上滚动值 window.screenX: 窗口左上角离屏幕左上角横向距...

北京时间5月16日,据bbin消息,老鹰在客场94-91艰难战胜奇才,挺进东部决赛。保罗...{ scrollY = window.pageYOffset; } else if (window.scrollY) { scrollY =...

{ scrollY=document.body.scrollTop; } else if(window.pageYOffset) { scrollY=window.pageYOffset; } else if(window.scrollY) { scrollY=window.scrollY; } ...