输入二级域，可以跳转到网页的二级域名页面．
<!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>
<script language="javascript">
function url()
{
window.open("http://"+formhoho.aa.value+".hao123.com/");
}
</script>
</head>
<body>
<form id="form1" name="formhoho" method="post" action="JavaScript:url();">
<label>
<input type="text" name="aa" />
</label>
<label>
<input type="submit" name="Submit" value="提交" />
</label>
</form>
</body>
</html>
