ASP.NET- Prompt confirmation only if needed

[nick1337]

I have a button. And I have a Session["actionMode"]. Here what I do in my buttonClick event:\[code\]protected void Button1_Click(object sender, EventArgs e){ if ((int)Session["actionMode"]==1) { //Do something } else if ((int)Session["actionMode"]==3) { //After confirmation delete a record }}\[/code\]As you can see if value of Session["actionMode"] equals 3 a record is deleted. But before deletion I want to prompt the user to confirm the action. So if value of Session["actionMode"] does not equal 3 I don't need any confirmation because it does not do anything that can't be undone. Is there a way I can achieve this? Javascript maybe?