static/hello.js

function myFunction() {
    var today = new Date();
    var h = today.getHours();
    var m = today.getMinutes();
    var s = today.getSeconds();
    var msg="";
    if (h<12) {
       msg="Good Morning, ";
    }
    if (h>=12 && h<18) {
       msg="Good Afternoon, ";
    }
    if (h>=18) {
       msg="Good Evening, ";
    }
    var x=document.getElementById('ttl').innerHTML;
    document.getElementById('ttl').innerHTML = msg+x;
    document.getElementById('time').innerHTML = h + ":" + m + ":" + s;
 }