<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<title>Block F5 Key In IE & Mozilla</title>
<script language="JavaScript">
var version = navigator.appVersion;
function showKeyCode(e)
{
var keycode =(window.event) ? event.keyCode : e.keyCode;
if ((version.indexOf('MSIE') != -1))
{
if(keycode == 116)
{
event.keyCode = 0;
event.returnValue = false;
return false;
}
}
else
{
if(keycode == 116)
{
return false;
}
}
}
</script>
</head>
<body onload="JavaScript:document.body.focus();" onkeydown="return showKeyCode(event)">
</body>
</html>
Program Demo
Note: Tested In IE 7 & Mozilla Firefox 2.0.0.6
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