门户网站建站，首先要解决的就是前台兼容问题
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>标题页</title>
<script language=javascript>
if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4))
{
document.write('<link rel=stylesheet type="text/css" href="ie.css">') //IE浏览器下的样式
}
else {
document.write('<link rel=stylesheet type="text/css" href="ns.css">')//Netscape下的样式
}
</script>
</head>
<body>
</body>
</html>
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navigator.userAgent.indexOf来判断浏览器类型
<script language="JavaScript">
<!--
function getOs() {
var OsObject = "";
if(navigator.userAgent.indexOf("MSIE")>0) {
return "MSIE";
}
if(isFirefox=navigator.userAgent.indexOf("Firefox")>0){
return "Firefox";
}
if(isSafari=navigator.userAgent.indexOf("Safari")>0) {
return "Safari";
}
if(isCamino=navigator.userAgent.indexOf("Camino")>0){
return "Camino";
}
if(isMozilla=navigator.userAgent.indexOf("Gecko/")>0){
return "Gecko";
}
}
alert("您的浏览器类型为:"+getOs());
-->
</script>
if (window.XMLHttpRequest) { // Mozilla, Safari, ...
http_request = new XMLHttpRequest();
} else if (window.ActiveXObject) { // IE
http_request = new ActiveXObject("Microsoft.XMLHTTP");
}
当然 你也可以导向不同的页面 获取不同过的内容
<script type="text/javascript">var sUserAgent = navigator.userAgent;
if ((sUserAgent.match(/iPad/i))) {
location = 'http://www.ifeng.com/ipad';
}
var mobileAgents = ['Windows CE', 'iPod', 'Symbian', 'iPhone', 'BlackBerry',
'Android'];
if (sUserAgent.indexOf('Android') > -1 && (sUserAgent.indexOf('ERD79') > -1 ||
sUserAgent.indexOf('MZ60') > -1 || sUserAgent.indexOf('GT-P7') > -1 || sUserAgent.indexOf
('SCH-P7') > -1)) {
} else {
if (location.href.indexOf('?pc') == -1) {
for (var i = 0; i < mobileAgents.length; i++) {
if (sUserAgent.indexOf(mobileAgents[i]) > -1) {
location = 'http://i.ifeng.com/?ch=ifengweb';
break;
}
}
} else {
location = 'http://www.ifeng.com/ipad';
}
}
var ads = [];
</script>
感谢:jude_lau
转载来自网络