How can i create on double click event on a ASP.Net TextBox.
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body class="newStyle2">
<form id="form1" runat="server">
<div>
<table class="auto-style1">
<tr>
<td class="auto-style2">Date</td>
<td class="auto-style11">
<asp:TextBox ID="Datesr" runat="server" Width="62px"></asp:TextBox>
</td>
<td class="auto-style9">Invno</td>
<td class="auto-style14">
<asp:TextBox ID="Invno" runat="server" Width="30px"></asp:TextBox>
</td>
<td class="auto-style4">Attendant:</td>
<td class="auto-style5">
<asp:TextBox ID="Usernames" runat="server" Width="76px"></asp:TextBox>
Account:</td>
<td class="auto-style6">
<asp:TextBox ID="Account" runat="server" Style="margin-left: 11px" Width="103px"></asp:TextBox>
</td>
<td class="auto-style8"> Name</td>
<td class="auto-style12">
<asp:TextBox ID="StudentNames" runat="server" CssClass="auto-style7" Width="206px"></asp:TextBox>
</td>
<td class="auto-style13">
<asp:TextBox ID="Classr" runat="server" Width="36px"></asp:TextBox>
<asp:TextBox ID="Streamr" runat="server" Width="36px"></asp:TextBox>
<asp:TextBox ID="StudentType" runat="server" Width="36px"></asp:TextBox>
<asp:TextBox ID="Colour" runat="server" Width="36px"></asp:TextBox>
</td>
<td> </td>
</tr>
<tr class="newStyle3">
<td colspan="11">
<asp:GridView ID="Gvgridclient" runat="server">
</asp:GridView>
</td>
</tr>
</table>
</div>
<asp:TextBox ID="invoicevalue" runat="server"></asp:TextBox>
</form>
</body>
</html>
<td class="auto-style6">
<asp:TextBox ID="TextBox1" runat="server" Style="margin-left: 11px" Width="103px"></asp:TextBox>
</td>
