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<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>javascript Check Whether the Browser is Java Enabled or Not</title> </head> <body> <script> function checkJavaEnabled() { if(navigator.javaEnabled()) { alert("Your browser is Java enabled."); } else { alert("Your browser is not Java enabled."); } } </script> <button type="button" onclick="checkJavaEnabled();">Check If Java is Enabled</button> </body> </html>