function round(num) {
amount = Math.round(num*Math.pow(10,2))/Math.pow(10,2);
amount -= 0;
// .99 cent format courtsey of Martin Webb
return (amount == Math.floor(amount)) ? amount + '.00' : ( (amount*10 == Math.floor(amount*10)) ? amount + '0' : amount);
}

function dectable() {
windowprops = 'personalbar=no,toolbar=no,' +
'status=no,scrollbars=yes,location=no,' +
'resizable=yes,menubar=no,width=540,height=400';
decimalWin=window.open('', 'table', windowprops);

decimalWin.document.open();
decimalWin.document.writeln(text);
decimalWin.document.close();
}

function stocks(form) {
shares = form.shares.value * 1;

buyprice = form.buyprice.value * 1;
buycomm = form.buycomm.value * 1;

sellprice = form.sellprice.value * 1;
sellcomm = form.sellcomm.value * 1;

bought = round(parseFloat(shares * buyprice) + buycomm); // price for purchase
sold = round(parseFloat(shares * sellprice) - sellcomm); // price sold for
result = round(sold - bought);

form.buycost.value  = "$ " + bought;
form.sellcost.value = "$ " + sold;
form.result.value = "$ " + result;
}