在内容不超过一屏的情况下,当浏览器窗口变小那行页脚文字会跟着向上浮动但还是保持在底部。
当内容多出一屏时,他显示在网页的最下边,而不是窗口的最下边;测试了一下,还可以,在IE6、IE7、FF等都没有问题!窗口缩小时也没有问题!
首先是JS脚本:
function test(){ var infoHeight = document.getElementById("info").scrollHeight; var bottomHeight = document.getElementById("bottom").scrollHeight; var allHeight = document.documentElement.clientHeight; var bottom = document.getElementById("bottom"); if((infoHeight + bottomHeight) < allHeight){ bottom.style.position = "absolute"; bottom.style.bottom = "0"; }else{ bottom.style.position = ""; bottom.style.bottom = ""; } setTimeout(function(){test();},10); } test();
查看运行效果:
<!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> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>CSS实例:让页脚保持在未满屏页面的底部</title> <style> *{ margin:0; padding:0} #info{background:#33CCFF} #bottom{background:#FFCC00;width:100%;} </style> </head> <body> <div id="info"> 2<br />2<br />2<br />2<br />2<br /><br />2<br />2<br />2<br />2<br />2<br /><br />2<br />20000</div> <div id="bottom">bottom</div> <script language="JavaScript" type="text/javascript"> function test(){ var infoHeight = document.getElementById("info").scrollHeight; var bottomHeight = document.getElementById("bottom").scrollHeight; var allHeight = document.documentElement.clientHeight; var bottom = document.ge |