document.title就行吧
如果是字符串这样
<script>
var str = '<title>abcdef</title>';
var title = str.match(/<title>(.+?)<\/title>/);
alert(title&&title[1]||null);
</script>
如果是字符串这样
<script>
var str = '<title>abcdef</title>';
var title = str.match(/<title>(.+?)<\/title>/);
alert(title&&title[1]||null);
</script>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<meta http-equiv="Content-Language" content="zh-CN" />
<meta content="all" name="robots" />
<meta name="author" content="盛飞, SenFe" />
<meta name="Copyright" content="" />
<meta name="description" content="" />
<meta content="" name="keywords" />
<script language="javascript"><!--
function senfe(){
alert(document.title);
}
--></script></head>
<title>aaaaaaaaaaaaaa</title>
<body onload="senfe()">
</body>
</html>
function senfe(){
alert(document.title);
}
--></script></head>
<title>aaaaaaaaaaaaaa</title>
<body onload="senfe()">
</body>
正则:(?<=<(title)>).*(?=<\/\1>)