Clear TextBox Text when clicked using JavaScript or jQuery in ASP.Net

Hi Venkimithu try this

Html Code

 <script type="text/javascript" src='<%=ResolveUrl("~/Scripts/jquery-1.4.1.js")%>'></script>
    <script src='<%=ResolveUrl( "~/Scripts/Scripts.js")%>' type="text/javascript"></script>
<div>
        <asp:TextBox ID="txtClearTextBox" runat="server"></asp:TextBox>     
    </div>
    </form>
    <script type="text/javascript">        
        $("[id*=txtClearText]").live("click", function () {
            $(this).val('');
        });
    </script>

Code

 if (!IsPostBack)
            {
                this.txtClearTextBox.Text = DateTime.Now.ToShortDateString();
            }

it is just a simple sample you can try this as you want