// JScript File

// Displays a greeting in the specified element based on the time of day.
function displayGreeting(elementId)
{
    var currentTime = new Date();
    var currentHour = currentTime.getHours();
    var greeting;
    
    if (currentHour < 12)
    {
        // Display "good morning" before 12 PM.
        greeting = "good morning";
    }
    else if (currentHour < 18)
    {
        // Display "good afternoon" between 12 PM and 6 PM.
        greeting = "good afternoon";
    }
    else
    {
        // Display "good evening" after 6 PM.
        greeting = "good evening";
    }
    
    document.getElementById(elementId).innerHTML = greeting;
}