日期:2014-05-17 浏览次数:20691 次
<!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=gb2312" /> <title>无标题文档</title> <style> body{ margin: 0px; padding: 0px; } #box{ margin-top: 500px; margin-left: 200px; } #top{ margin-top: 100px; margin-left: 300px; } #bottom{ margin-top: 1240px; margin-left: 300px; } #sig{ height: 20px; width: 90px; margin-left: 100px; margin-top: 100px; background-color: #0066FF; font-weight: bold; color: #FFFFFF; } #ajax{ background-color: #CCCCCC; position: absolute; z-index: 9999; left: 0px; top: 0px; right: 0px; bottom: 0px; } </style> </head> <body> <div onclick="ec()" id="sig">点击注册</div> <div id="top"> 求这能看到(要求灰色背景在的前提下) </div> <div id="box"> 求这能看到(要求灰色背景在的前提下) </div> <div id="bottom"> 求这也能看到 </div> </body> <script> function $(x){ return document.getElementById(x);} function ec() { if($('ajax')){ $('ajax').parentNode.removeChild($('ajax')); } var div = document.createElement("div") div.setAttribute("id", "ajax"); div.style.height =document.body.clientHeight+"px"; //定位 div.style.width =document.body.clientWidth+"px"; document.body.appendChild(div); $('ajax').innerHTML="<b>aaaaaaaaaaaaaaaa </b>" } </script> </html>