hidden form value and configurator price js

[mav]

I have this javascript for a computer configurator that does automatic price updates. It works with select manus but I need it to work with hidden tags as well. Here's the code...

function showPrice(form)
{
var myTotalPrice = 0;
var showUP = 0;
var myMathProblem = "";
myItemPrice = parseFloat(form.nuPrice.value);
for (var i = 0; i < form.elements.length; i++)
{
var e = form.elements[i];
if ( e.type == 'select-one' )
{
showUP = 1;
Item = e.selectedIndex;
myPrice = e.options[Item].text;
myDollarSign = myPrice.indexOf("$",0)
if ( myDollarSign != "-1" )
{
myParSign = myPrice.indexOf(")", myDollarSign);
myAttributeString = myPrice.substring(myDollarSign+1, myParSign);
myAttributeString = myAttributeString.replace(/,/,"");
myAttributePrice = parseFloat(myAttributeString);
myMathProblem = myPrice.charAt(myDollarSign - 1);
} else { myAttributePrice = 0; }
if (myMathProblem == "-")
{
myTotalPrice = myTotalPrice - myAttributePrice;
} else {
myTotalPrice = myTotalPrice + myAttributePrice;
}
}
}
if ( showUP )
{
myTotalPrice = FormatNumber(myTotalPrice + myItemPrice);
document.getElementById("productNEWprice").innerHTML = "Subtotal Price with Options $" + myTotalPrice;
}
}

I'm going crazy trying to get it to work with hidden form tags... please help. Thanks.

[mav]

This what I tried...

function showPrice(form)
{
var myTotalPrice = 0;
var showUP = 0;
var myMathProblem = "";
myItemPrice = parseFloat(form.nuPrice.value);
for (var i = 0; i < form.elements.length; i++)
{
var e = form.elements[i];
if ( e.type == 'select-one' )
{
showUP = 1;
Item = e.selectedIndex;
myPrice = e.options[Item].text;
myDollarSign = myPrice.indexOf("$",0)
}
else if ( e.type == 'hidden' )
{
showUP = 1;
myPrice = parseFloat(e.value);
myDollarSign = myPrice.indexof("$",0)
}
if ( myDollarSign != "-1" )
{
myParSign = myPrice.indexOf(")", myDollarSign);
myAttributeString = myPrice.substring(myDollarSign+1, myParSign);
myAttributeString = myAttributeString.replace(/,/,"");
myAttributePrice = parseFloat(myAttributeString);
myMathProblem = myPrice.charAt(myDollarSign - 1);
} else { myAttributePrice = 0; }
if (myMathProblem == "-")
{
myTotalPrice = myTotalPrice - myAttributePrice;
} else {
myTotalPrice = myTotalPrice + myAttributePrice;
}
}
}

Gives me an error. The value I'm passing is formatted like this: +$10.00

[mav]

Anyone?