Javascript werkt niet

<script language="JavaScript">
<!--
var prices = new Object();

function changePrice() {
   f = document.gameprices;
   var price = 0;
   var slots = 0;
   var pub = f.pub[f.pub.selectedIndex].value;
   if(pub == private) {
      slots = f.slots[f.slots.selectedIndex].value * 0,875;
      f.price.value = '€ '+slots;
   }
   else {
      slots = f.slots[f.slots.selectedIndex].value * 1,00;
      f.price.value = '€ '+slots;
   }
}

function round(number,X) {
   X = (!X ? 2 : X);
   return Math.round(number*Math.pow(10,X))/Math.pow(10,X);
}
//-->
</script>

<script language="JavaScript">
<!--
var prices = new Object();
 
function changePrice() {
   f = document.gameprices;
   var price = 0;
   var slots = 0;
   var pub = f.pub[f.pub.selectedIndex].value;
   if(pub == private) {
      slots = f.slots[f.slots.selectedIndex].value * 0,875;
      f.price.value = '€ '+slots;
   }
   else {
      slots = f.slots[f.slots.selectedIndex].value * 1,00;
      f.price.value = '€ '+slots;
   }
}
 
function round(number,X) {
   X = (!X ? 2 : X);
   return Math.round(number*Math.pow(10,X))/Math.pow(10,X);
}
//-->
</script>