this just isn't happening

i want a script which prompts for the price of a product, then calculates and displays it after it has been reduced by a percentage.

ok so e.g
someone enters 100 in the prompt then that is reduced by 10%

anyone understand me let alone help lol?

<script type="text/javascript">
function discount(price, disc) {
return price -(price * (disc/100));
}
var currPrice = prompt("Price",0);

if (currPrice > 0) {
alert("Discounted price = " + discount(currPrice,10));
}

</script>

WOW chrishirst!!!