a javascript function to display a Greeting on a website depending on the hour of the day on the client's computer.

getgreeting

//getGreeting function

function getGreeting (hour) {
    hour = hour || new Date().getHours();
        if (typeof hour === "number"){
            if (hour <= 12) {
            return "Good Morning";
            } else if (hour <= 17) {
            return "Good Afternoon";
            } else {
            return "Good Evening";
            }
        } else {
            alert("Hour has to be a number.");
        }
}
getGreeting(12.5);