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TextBox Watermark Using JavaScript and CSS

, 29 May 2009
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Apply watermark in TextBox using JavaScript

Introduction

In this article, I will explain how watermark textbox using JavaScript and CSS is very useful and uses less resources compared to AJAX.

Overview

JavaScript is used to implement TextBox ‘onfocus’ and ‘onblur’ event and CSS is used to decorate TextBox.

Using the Code

a.Bind the onfucus event to remove watermark and the onblur event to decorate textbox as watermark.

 <style type="text/css">
        .WaterMarkedTextBox
        {
            height: 16px;
            width: 168px;
            padding: 2px 2 2 2px;
            border: 1px solid #BEBEBE;
            background-color: #F0F8FF;
            color: gray;
            font-size: 8pt;
            text-align: center;
        }
        .WaterMarkedTextBoxPSW
        {
            background-position: center;
            height: 16px;
            width: 168px;
            padding: 2px 2 2 2px;
            border: 1px solid #BEBEBE;
            background-color: #F0F8FF;
            color: white;
            vertical-align: middle;
            text-align: right;
            background-image: url(Images/psw_wMark.png);
            background-repeat: no-repeat;
        }
        .NormalTextBox
        {
            height: 16px;
            width: 168px;
        }
    </style>
 <script language="javascript" type="text/javascript">
        function Focus(objname, waterMarkText) {
            obj = document.getElementById(objname);
            if (obj.value == waterMarkText) {
                obj.value = "";
                obj.className = "NormalTextBox";
                if (obj.value == "User ID" || obj.value == "" || obj.value == null) {
                    obj.style.color = "black";
                }
            }
        }
        function Blur(objname, waterMarkText) {
            obj = document.getElementById(objname);
            if (obj.value == "") {
                obj.value = waterMarkText;
                if (objname != "txtPwd") {
                    obj.className = "WaterMarkedTextBox";
                }
                else {
                    obj.className = "WaterMarkedTextBoxPSW";
                }
            }
            else {
                obj.className = "NormalTextBox";
            }

            if (obj.value == "User ID" || obj.value == "" || obj.value == null) {
                obj.style.color = "gray";
            }
        }
    </script> 
<body>
    <form id="form1" runat="server">
    <div>
        <h3>
            Watermark Textbox using JavaScript and CSS</h3>
    </div>
    <table>
        <tr>
            <td>
                User Id
            </td>
            <td>
                <asp:TextBox ID="txtUserId" runat="server" 
		onfocus="Focus(this.id,'User ID')"
                    onblur="Blur(this.id,'User ID')" 
		    Width="126px" CssClass="WaterMarkedTextBox">User ID</asp:TextBox>
            </td>
        </tr>
        <tr>
            <td>
                Password
            </td>
            <td>
                <asp:TextBox ID="txtPwd" TextMode="Password" 
		runat="server" onfocus="Focus(this.id,'')"
                    onblur="Blur(this.id,'')" Width="126px" 
			CssClass="WaterMarkedTextBoxPSW" />
            </td>
        </tr>
        <tr>
            <td>
            </td>
            <td>
                <asp:Button ID="Button1" runat="server" Text="Submit" />
            </td>
        </tr>
    </table>
    </form>
</body> 

History

  • 29th May, 2009: Initial post

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Md.Asaduzzaman Azad
Data Path Limited
Bangladesh Bangladesh
No Biography provided

Comments and Discussions

 
Generalnice aerticle PinmemberBinu198522-Jul-14 1:17 
GeneralMy vote of 5 Pinmembertuhincse249-Oct-12 20:22 
QuestionTextMode="Password" PinmemberArin.Net8-Jul-12 23:39 
GeneralMy vote of 4 PinmemberArin.Net8-Jul-12 23:36 
GeneralMy vote of 4 PinmemberLee Reid26-Mar-12 15:09 
GeneralMy vote of 5 Pinmemberodhin22-Sep-11 23:25 
GeneralMy vote of 5 Pinmemberzhangtai12-Dec-10 16:22 
Generalvalidators Pinmemberthebts28-Dec-09 0:12 
Question???? PinmemberJohnny J.29-May-09 3:36 
AnswerRe: ???? PinmemberMd.Asaduzzaman Azad3-Jun-09 18:26 
AnswerRe: ???? Pinmembermusacj9-Jun-09 6:12 

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