<!DOCTYPE html>
<html>
<head>
<title>html tutorial - html5 - html code - html form - In 30Sec by Microsoft Award MVP - | wikitechy onoffline attribute</title>
</head>
<body onoffline="offline()">
<h2>Goto file menu and click "Work Offline"</h2>
<p>
Learn to Code in Wikitechy <br>
Teach people how different technologies are organized<br>
<b>Note:</b> onoffline only supported in Firefox and Internet Explorer version 8 to 10.
</p>
<script>
function offline () {
alert ("You are working in offline.");
}
</script>
</body>
</html>
<html>
<head>
<title>html tutorial - html5 - html code - html form - In 30Sec by Microsoft Award MVP - | wikitechy onoffline attribute</title>
</head>
<body onoffline="offline()">
<h2>Goto file menu and click "Work Offline"</h2>
<p>
Learn to Code in Wikitechy <br>
Teach people how different technologies are organized<br>
<b>Note:</b> onoffline only supported in Firefox and Internet Explorer version 8 to 10.
</p>
<script>
function offline () {
alert ("You are working in offline.");
}
</script>
</body>
</html>
Result