<script type="text/javascript" language="javascript">
  function test()
  {
    alert("oec2003");
    return false;
  } 
</script>

protected void Button1_Click(object sender, EventArgs e)
{
  ClientScript.RegisterStartupScript(this.GetType(), "clear", "<script>test()</script>");
}

public string GetAuthStatus()
    {
      ViewState["Auth"] = "Red";
      return ViewState["Auth"].ToString();
    }

<script type="text/javascript" language="javascript">
  function getAuth() 
  {
    var authStatus = "<%=GetAuthStatus()%>";
    return authStatus;
  }
</script>

document.all("button1").click();