The taintEnabled() specifies whether data tainting is enabled.
<html>
<head>
<title> Example of the taintEnabled method of the navigator object</title>
</head>
<body>
<script language="JavaScript">
<!-- if(navigator.taintEnabled()){
document.write("Data tainting is enabled");
} else{
document.write("There is no data tainting");
}
-->
</script>
</body>
</html>