Edit in JSFiddle

Result
JavaScript
HTML

$(document).ready(function () {
                $("#empty").click(function () {
                    $("#targetDiv").empty();
                });
            });

<html>
        <head>
        <title>empty</title>
        </head>
        <body>
        <div id="targetDiv">
        <p>This is p element inside div.</p>
        <span>This is span element inside div.</span>
        <h4>This is h4 element inside div.</h4>
        </div><br />
        <input type="button" id="empty" value="empty"/>
        <input type="button" id="reset" value="Reset" onclick="location.reload()" />
        </body>
        </html>