public class BlurTextbox : TextBox, IPostBackEventHandler
{
	#region control events

	protected override void OnInit(EventArgs e)
	{
		base.OnInit(e);
		if (!Page.ClientScript.IsClientScriptBlockRegistered("OnBlurTextboxEvent"))
			Page.ClientScript.RegisterStartupScript(GetType(), "OnBlurTextboxEvent", GetScript(), true);
		Attributes.Add("onblur", "OnBlurred('" + UniqueID + "','')");
	}

	#endregion

	#region OnBlur event

	public delegate void OnBlurDelegate(object sender, EventArgs e);

	public event OnBlurDelegate Blur;

	private void RaiseOnBlurEvent()
	{
		if (Blur != null)
		{
			Blur(this, EventArgs.Empty);
		}
	}

	#endregion

	#region methods

	private string GetScript()
	{
		return "function OnBlurred(control, arg)\n{\n __doPostBack(control, arg);\n}";
	}

	#endregion

	#region Implementation of IPostBackEventHandler

	/// <summary>
	/// When implemented by a class, enables a server control to process an event raised when a form is posted to the server.
	/// </summary>
	/// <param name="eventArgument">A <see cref="T:System.String" /> that represents an optional event argument to be passed to the event handler. </param>
	public void RaisePostBackEvent(string eventArgument)
	{
		RaiseOnBlurEvent();
	}

	#endregion
}