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TextBox Watermark Using JavaScript and CSS

, 29 May 2009 CPOL
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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

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Comments and Discussions

 
Generalnice aerticle Pin
Binu198522-Jul-14 1:17
memberBinu198522-Jul-14 1:17 
GeneralMy vote of 5 Pin
tuhincse249-Oct-12 20:22
membertuhincse249-Oct-12 20:22 
QuestionTextMode="Password" Pin
Arin.Net8-Jul-12 23:39
memberArin.Net8-Jul-12 23:39 
GeneralMy vote of 4 Pin
Arin.Net8-Jul-12 23:36
memberArin.Net8-Jul-12 23:36 
GeneralMy vote of 4 Pin
Lee Reid26-Mar-12 15:09
memberLee Reid26-Mar-12 15:09 
GeneralMy vote of 5 Pin
odhin22-Sep-11 23:25
memberodhin22-Sep-11 23:25 
GeneralMy vote of 5 Pin
zhangtai12-Dec-10 16:22
memberzhangtai12-Dec-10 16:22 
Generalvalidators Pin
thebts28-Dec-09 0:12
memberthebts28-Dec-09 0:12 
Question???? Pin
Johnny J.29-May-09 3:36
memberJohnny J.29-May-09 3:36 
AnswerRe: ???? Pin
Md.Asaduzzaman Azad3-Jun-09 18:26
memberMd.Asaduzzaman Azad3-Jun-09 18:26 
AnswerRe: ???? Pin
musacj9-Jun-09 6:12
membermusacj9-Jun-09 6:12 

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