Edit in JSFiddle

$(document).ready(function () {
                $("#buttonHideNormal").click(function () {
                    $("#form").hide();
                });

                $("#buttonHideAnimation").click(function () {
                    $("#form").hide("slow", function () {
                        alert("hide with duration slow !!");
                    });
                });
                $("#buttonShow").click(function () {
                    $("#form").show();
                });
            });
<html>
        <head>
        <title>hide in jQuery</title>
        </head>
        <body>
        <fieldset id="form">
        <legend>Form</legend>
        <table>
        <tr>
        <td><label>Name:</label></td>
        <td><input type="text" id="txtName"><td>
        </tr>
        <tr>
        <td><label>Age:</label></td>
        <td><input type="text" id="txtAge"><td>
        </tr>
        <tr>
        <td><label>Address:</label></td>
        <td><input type="text" id="txtAddress"><td>
        </tr>
        </table>
        </fieldset><br />
        <div id="buttonDiv">
        <input type="button" id="buttonHideNormal" value="Hide Normal"/>
        <input type="button" id="buttonHideAnimation" value="Hide Animation"/>
        <input type="button" id="buttonShow" value="Show"/>
        </div>
        </body>
        </html>
fieldset
        {
        width:300px;
        margin-left:100px;
        }
        #buttonDiv
        {
        margin-left:100px;
        }