Change background and border color of ASP.Net TextBox and Multiline TextBox on focus using CSS

Introduction: In this article I am going to explain how to highlight asp.net textbox or multiline textbox by changing border and background color on focus using pure CSS(Cascading Style Sheet).
Change background and border color of ASP.Net TextBox and Multiline TextBox on focus using CSS


Description: In one of my previous article I explained the same i.e. Highlight asp.net or html textbox on focus using jquery . But I strongly recommend the use of CSS for this purpose because it is cross browser compatible, fast and even works for any technology you wish to use for example HTML, Asp.Net, PHP etc.

Implementation: Let’s create a sample web page to demonstrate the concept

HTML source
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <style type="text/css">
        .txt {
            border1px solid #e5e5e5;
            padding4px;
            color#333333;
            font-size14px;
            background-color#ffffff;
        } 
            .txt:focus {
                border-color#56aff1;
                background-color#fff4d8;
            }
    </style>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <fieldset style="width270px;">
                <legend>Highlight textbox using CSS</legend>
                <table>
                    <tr>
                        <td>Name:</td>
                        <td>
                            <asp:TextBox ID="txtName" CssClass="txt" runat="server"></asp:TextBox> 
                        </td>
                    </tr>
                    <tr>
                        <td>Email:</td>
                        <td>
                            <asp:TextBox ID="txtEmail" CssClass="txt" runat="server"></asp:TextBox>
                        </td>
                    </tr>
                    <tr>
                        <td>Address:</td>
                        <td>
                            <asp:TextBox ID="txtAddress" TextMode="MultiLine" Rows="3" Columns="30" CssClass="txt" runat="server"></asp:TextBox>
                        </td>
                    </tr>
                </table>
            </fieldset>
        </div>
    </form>
</body>
</html> 

Explanation:  I have created a css class 'txt' in the head tag and added the default style to the textbox controls and also added the styles that will appear whenever the textbox gets focus. Then I have assigned this css class to each control on I want to add the style.

Now over to you:
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