Disable button on click ASP.Net 2.0 or higher (prevent double click)

There is a need, at times, to prevent the user from clicking a button?multiple?times. ?Since ASP.Net already wraps something into the onclick event, you need to change this behavior. ?Below is the code to do this:

btnSave.Attributes.Add("onclick", 
    "this.value='Processing...';this.disabled=true;" + 
    GetPostBackEventReference(btnSave).ToString());

btnSave is the name of the button you want to disable during postback.