比如打开 淘宝，向下滚动，顶部的搜索栏会固定不动。。
光标就算放在顶部的搜索栏，滚动鼠标的滚轮，页面仍然会滚动
怎么实现，要完全兼容，哪怕是IE6
you can do it like this.
<!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>无标题文档</title><style>body{margin:0;height:2000px;}input{float:left;padding:0;margin:0;}.box{height:40px;padding:10px 0;background:#ccc; text-align:center; position:fixed;_position:absolute;width:100%;_top:expression(eval(document.documentElement.scrollTop));}.search{height:100%;width:410px;margin:0 auto;}.search .text{width:300px;height:28px;padding:4px 0 4px 6px;border:solid 2px blue;font-size:14px;line-height:30px;}.search .btn{background:blue;border:none;height:40px;width:100px;padding:0 10px;}</style></head><body><div class="box" id="box"> <div class="search"> <input type="text" class="text"/> <input type="button" value="搜索" class="btn"/> </div></div></body></html>
