Second Question
HTML
<h3>
Reverse Words
</h3>
<input type="text" id="input_txt" />
<button onclick="reverseWords()">Reverse</button>
<br>
<span>Output:</span>
<strong id="output"></strong>
JavaScript
function reverseWords() {
var text = document.getElementById('input_txt').value;
var words = text.split(' ');
var op = document.getElementById('output');
op.innerHTML = words.reverse().join(' ');
}