Hi Everyone

I have this code:

Code:
 <script language="JavaScript">
 var one=0;
 var two=0;

 function myCalc() {

 one=Math.abs(parseFloat(document.FORM.one.value));
 two=Math.abs(parseFloat(document.FORM.two.value));

 document.FORM.two.value=(one*12.99);

 }
 </script>
which simply multiplies 'one' by 12.99.

I need to have it so if the number is more than 1 in 'one' it add's 12.99 and then and only adds 6.50 for every other number more than 1.

Basically what I want it to do is work out a figure if you buy 1 you get the others at half price.

Is this doable with this script?

Many thanks