Edit in JSFiddle

Result
JavaScript
HTML

$(document).ready(function () {
                $("#myButton").click(function () {
                    $("#targetP").text("Welcome to 20 Fingers and 2 Brains. You clicked text() button.");
                });
            });

 <html>
        <head>
        <title>text</title>
        </head>
        <body>
        <p id="targetP">This is 20 Fingers and 2 Brains.</p>
        <input type="button" id="myButton" value="text()"/>
        <input type="button" id="reset" Value="Reset" onclick="location.reload()" />
        </body>
        </html>