add code to all button on my asp.net website?

[Anthony]

I want add the following to all button on my website  i.e.
button.Attributes.Add("onclick",
ClientScript.GetPostBackEventReference(button, "") +
";this.value='Processing Credit Card Payment...';this.disabled = true;")

 

Is there an easy to automatically apply this to all buttons?

 

regards

Anthony (*12QWERNB*)