JS Not working on FF

hello,

i have a javascript that calculate the total price on [url]www.madeinwater.co.uk/pool.html[/url] that is not working on FF but OK on IE.

the FF error console says “caddie is not defined” and the code is:

<script language=”javascript” type=”text/javascript”>
<!–
function calculette ()
{
var total=0;
if (caddie.include.checked)
total+=100.95;
if (caddie.X1include.checked)
total+=100.95;
if (caddie.X2include.checked)
total+=21.00;
if (caddie.X3include.checked)
total+=21.00;
if (caddie.X4include.checked)
total+=21.00;
if (caddie.X5include.checked)
total+=60.95;
if (caddie.X6include.checked)
total+=9.95;
if (caddie.X7include.checked)
total+=10.00;
if (caddie.X8include.checked)
total+=2.35;
if (caddie.X9include.checked)
total+=2.35;
if (caddie.X10include.checked)
total+=28.75;
if (caddie.X11include.checked)
total+=24.95;
if (caddie.X12include.checked)
total+=24.95;
if (caddie.X13include.checked)
total+=16.60;
if (caddie.X14include.checked)
total+=7.95;
if (caddie.X15include.checked)
total+=5.50;
if (caddie.X16include.checked)
total+=6.50;
if (caddie.X17include.checked)
total+=2.50;
if (caddie.X18include.checked)
total+=9.95;
if (caddie.X19include.checked)
total+=15.00;
caddie.Total.value=” “+total;
}
//–>
</script>

</HEAD>

how do i define caddie?
many thanks in advance for your help on this.

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