text: //alert ('hello world'); 
  function myFunction() {
      
      document.getElementById("h1ref").style.backgroundColor = "greenyellow";
      //document.querySelector(".info").style.color = "green";
      
      myArray = document.querySelectorAll(".info");
      myArray.forEach(function(items) {
           items.style.color ="green";
        });
      
  }
  
  function changeContent(){
          //document.body.innerHTML = "<p>Test</p>"
          document.getElementById("h1ref").innerHTML = "You are doing excellent job in Dev Tool Kit 1";
          document.getElementById("h1ref").style.backgroundColor = "yellow";
          var myLinkVar = document.getElementById("myLink");
          myLinkVar.href ="http://www.globalcert.cloud/";
          myLinkVar.innerHTML ="Global Certificates"; 
  
      }