append li to ul javascript

//create and append element
 var node = document.createElement("LI");                 // Create a <li> node

 var textnode = document.createTextNode("Water");         // Create a text node

 node.appendChild(textnode);                              // Append the text to <li>

 document.getElementById("myList").appendChild(node);     // Append <li> to <ul> with id="myList" 

function function1() {
  var ul = document.getElementById("list");
  var li = document.createElement("li");
  li.appendChild(document.createTextNode("Four"));
  ul.appendChild(li);
}

var element = document.getElementById("div1");
element.insertBefore(para, element.firstChild);