如何确认并禁用asp.net/javascript中的按钮

I have a standard ASP.NET 2.0 web page with a Delete button on it. What I need and can't figure out how to pull off is when the user presses the delete button a confirm dialog popups asking the user "are you sure?". If the user says yes then I want to disable the delete button and perform a postback that will run the server side code deleteButton_Click. I have a standard ASP.NET 2.0 web page with a D