日期:2014-05-17 浏览次数:20678 次
<style type="text/css"> #demo { width:150px; border:1px solid #CCC; margin:0 auto; } </style> <div id="demo">DEMO</div>
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例子
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<style type="text/css">
html,body{margin:0;padding:0;}
#y1 {position:fixed;top:0;left:0;width:100px;height:100px;border:1px solid red;}
#y2 {position:fixed;top:0;right:0;width:100px;height:100px;border:1px solid red;}
#y3 {position:fixed;bottom:0;left:0;width:100px;height:100px;border:1px solid red;}
#y4 {position:fixed;bottom:0;right:0;width:100px;height:100px;border:1px solid red;}
</style>
<!--[if lte IE 6]>
<style>
#y1 {position:absolute;}
#y2 {position:absolute;}
#y3 {position:absolute;}
#y4 {position:absolute;}
</style>
<![endif]-->
<script type="text/javascript">
//以下所有脚本只为IE6写,其他浏览器完全可以删除。
function getViewportScrollX() {
var scrollX = 0;
if (document.documentElement && document.documentElement.scrollLeft) {
scrollX = document.documentElement.scrollLeft;
}
else if (document.body && document.body.scrollLeft) {
scrollX = document.body.scrollLeft;
}
else if (window.pageXOffset) {
scrollX = window.pageXOffset;
}
else if (window.scrollX) {
scrollX = window.scrollX;
}
return scrollX;
}
function getViewportScrollY() {
var scrollY = 0;
if (document.documentElement && document.documentElement.scrollTop) {
scrollY = document.documentElement.scrollTop;
}
else if (document.body && document.body.scrollTop) {
scrollY = document.body.scrollTop;
}
else if (window.pageYOffset) {
scrollY = window.pageYOffset;
}
else if (window.scrollY) {
scrollY = window.scrollY;
}
return scrollY;
}
function getViewportWidth() {
var width = 0;
if (document.documentElement && document.documentElement.clientWidth) {
width = document.documentElement.clientWidth;
}
else if (document.body && document.body.clientWidth) {
width = document.body.clientWidth;
}
else if (window.innerWidth) {
width = window.innerWidth - 18;
}
return width;
}
function getViewportHeight() {
var height = 0;
if (window.innerHeight) {
height = window.innerHeight - 18;
}
else if (document.documentElement && document.documentElement.clientHeight) {
height = document.documentElement.clientHeight;
}
else if (document.body && document.body.clientHeight) {
height = document.body.clientHeight;
}
return height;
}
if (navigator.userAgent.indexOf("MSIE 6") > -1 && navigator.userAgent.indexOf("MSIE 7") == -1 && navigator.userAgent.indexOf("MSIE 8") == -1) {
window.ononload = window.onscroll = window.onresize = function (e) {
var t = getViewportScrollY();
var l = getViewportScrollX();
var w = getViewportWidth();
var h = getViewportHeight();
document.getElementById("y1").style.left = l