lav et nyt website..
erstat default.aspx inholdet med dette
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="
http://www.w3.org/1999/xhtml" >
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="TextBox1" runat="server">teeeest</asp:TextBox>
</div>
</form>
</body>
</html>
og erstat indholdet af codebehind filen med dette
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
TextBox1.Attributes.Add("style","background-color:#999999");
TextBox1.Attributes.Add("onclick", "changeit(this);");
string javascript = @"<script type=""text/javascript""> "+
"function changeit(something) "+
"{ "+
"something.style.background = '#000000'; "+
"something.style.color = '#FFFFFF'; "+
"something.value = ''; "+
"} "+
"</script>";
ClientScript.RegisterClientScriptBlock(this.GetType(), "changeit(this);", javascript);
}
}