<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Example:Replacing noscript</title>
<script type="text/javascript">
function noscript()
{
if(!document.getElementById||!document.createTextNode){return;}
var noJSmsg=document.getElementById(‘noscripting‘);
if(!noJSmsg){return;}
var headline=‘Browser test succeeded‘;
replaceMessage=‘We tested if your browser is capable of ‘;
replaceMessage+=‘supporting the application,and all checked out fine.‘;
replaceMessage+=‘Please proceed by activating the following link.‘;
var linkMessage=‘Proceed to application.‘;
var head=document.createElement(‘h1‘);
head.appendChild(document.createTextNode(headline));
noJSmsg.parentNode.insertBefore(head,noJSmsg);
var infoPara=document.createElement(‘p‘);
infoPara.appendChild(document.createTextNode(replaceMessage));
noJSmsg.parentNode.insertBefore(infoPara,noJSmsg);
var linkPara=document.createElement(‘p‘);
var appLink=document.createElement(‘a‘);
appLink.setAttribute(‘href‘,‘application.aspx‘);
appLink.appendChild(document.createTextNode(linkMessage));
linkPara.appendChild(appLink);
noJSmsg.parentNode.replaceChild(linkPara,noJSmsg);
}
window.onload=noscript;
</script>
</head>
<body>
<p id="noscripting">
We are sorry,but this application needs JavaScript to be
enabled to work.Please <a href="contact.html">contact us</a>
if you cannot enable scripting and we will try to help you in
other ways
</p>
</body>
</html>
原文：http://www.cnblogs.com/vonk/p/3979648.html