After inserting the data into database,i want to create the alert box

// refer it , i think u will get the solution........
if(isset($_GET["submit"]))
 {
       $number=$_POST['id'];
       $name=$_POST['name'];
       $userid=$_POST['userid'];
       $password =$_POST['password'];
       $address = $_POST['address'];
       $phone = $_POST['phone'];
       $email=$_POST['email'];

       $insertsql = "INSERT INTO userinfo (name,userid,password,address,phone,email)
       values('$name','$userid','$password','$address','$phone','$email')";

       $insertrs = mysql_query($insertsql) or die(mysql_error());

       if($insertrs)
     {
        echo "<b>Form has been submited </b>";    <= this is a alert msg
       }
       else { echo " <b>Error occured </b>";}
  }