[NX5]

Hi

I'm trying to make an order form. Its going great apart from this. When the person selects the amount of products he wants to buy, I want to display the price without refreshing the page.
The code I have at the moment does the job of getting the value from the select box, but goes to another page and displays the value when I want it in the same page.
I have an onChange value on the select box calling the function below.
The form is called reserve and the select box is called amount.

<script language="javascript">
function Display() {
var no = document.reserve.amount.value
document.write(no)
}
</script>

Can someone please tell me how to make this work properly?!