日期:2014-05-17 浏览次数:20621 次
<!DOCTYPE HTML> <html> <head> <meta charset="gb2312" /> <title></title> <style> #wraps{ margin:0px auto; width:960px; border:1px solid red; position:relative; left:0; top:0; } </style> </head> <body> <div id="wraps">123</div> <button id="btn">body长高了,div会移动吗?</button> <script> var $ = function(id){ return document.getElementById(id); }; var $t = function(tag, cot){ cot = cot || document; return cot.getElementsByTagName(tag); }; var a = document.body.offsetWidth; $('btn').onclick = function(){ $t('body')[0].style.height = '2000px'; var b = document.body.offsetWidth; var t = a - b; //console.log(t) if( t ){ $('wraps').style.left = t/2+'px'; } } </script> </body> </html>
------解决方案--------------------
5楼的,如果切换浏览器窗口大小呢?最大化,还原……