I want to add something like '#coupon' to my page's url. can any one help me?

`http://www.myhost.com/design-brief.php#coupon`

```
<?php
    if(isset($_POST['TryCoupon'])) 
    {
        // I need something here
        // I dont want to use Location to direct as I am on the same page and want to preserve field values
    } 
?>

```

I have a anchor on my page and I want the user to go to that when user submits the form.

```
<td id="coupon"></td>

```