My friend's Client Programming (JavaScript class)'s professor wants their students to use pure JavaScript to make applications that works on IE 6 and up...

function checkBrowser() {
if(browser == "Internet Explorer") {
print("I'm sorry, you have reached the 404 error page. Please use a different browser. Have a nice day.");
}
else {
print("Thank you for not using Internet Explorer");
}
}

My friend keeps claiming Internet Explorer is better than everything else until I told him that Microsoft doesn't update it much anymore...