Edit in JSFiddle

Result
JavaScript
HTML

$(document).ready(function () {
                $("#myButton").click(function () {
                    $(".eachDiv").each(function (i) {
                        $(this).append("Div " + i);
                    });
                });
            });

<html>
        <head>
        <title>each</title>
        </head>
        <body>
        <div class="eachDiv">This is </div>
        <div class="eachDiv">This is </div>
        <div class="eachDiv">This is </div>
        <div class="eachDiv">This is </div>
        <input type="button" id="myButton" value="Click ME"/>
        </body>
        </html>