判断是否IE6，如果是则提示升级浏览器
<!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" /><meta http-equiv="MSThemeCompatible" content="no" /><title></title><style type="text/css"> #ie6-warning{ background:rgb(255,255,225) url("http://dl.iteye.com/upload/attachment/474608/b47ae4df-5c3a-39b4-b620-0de68fa5904a.gif") no-repeat scroll 3px center; position:absolute; top:0; left:0; font-size:12px; color:#333; width:97%; padding: 2px 15px 2px 23px; text-align:center; } #ie6-warning a { text-decoration:none; } </style> </head><body><!--[if lte IE 6]> <div id="ie6-warning">您正在使用 Internet Explorer 6，在本页面的显示效果可能有差异。建议您升级到 <a href="http://www.microsoft.com/china/windows/internet-explorer/" target="_blank">Internet Explorer 8</a> 或以下浏览器： <a href="http://www.mozillaonline.com/">Firefox</a></div> <script type="text/javascript"> function position_fixed(el, eltop, elleft){ // check if this is IE6 if(!window.XMLHttpRequest) window.onscroll = function(){ el.style.top = (document.documentElement.scrollTop + eltop)+"px"; el.style.left = (document.documentElement.scrollLeft + elleft)+"px"; } else el.style.position = "fixed"; } position_fixed(document.getElementById("ie6-warning"),0, 0); </script> <![endif]--> </body></html>