x
<html><body><p>Click the buttons to compare the <strong>first item</strong> in two of the lists.</p><button onclick="myFunction('myList1','myList2')">Compare List 1 and 2</button><button onclick="myFunction('myList1','myList3')">Compare List 1 and 3</button><br><br>List 1:<ul id="myList1"><li>Water</li><li>Milk</li></ul>List 2:<ul id="myList2"><li>Coffee</li><li>Tea</li></ul>List 3:<ul id="myList3"><li>Water</li><li>Fire</li></ul><p id="demo"></p><script>function myFunction(x,y) { var item1 = document.getElementById(x).firstChild; var item2 = document.getElementById(y).firstChild; var x = item1.isEqualNode(item2); document.getElementById("demo").innerHTML = x;}</script></body></html>