Further problems with totaling script

I have had help with this one before but now a new problem was discovered with it.  If in the first
price field, you enter a $, it does not total as it should and causes errors.  It doesn't work and causes errors when you use the auto-complete feature
that is built into IE to fill in the quantity field.  Here is the script:

<SCRIPT LANGUAGE="JavaScript">
function dp(price)
{
string = "" + price;
number = string.length - string.indexOf('.');
if (string.indexOf('.') == -1)
return string + '.00';
if (number == 1)
return string + '00';
if (number == 2)
return string + '0';
if (number > 3)
return string.substring(0,string.length-number+3);
return string;
}
function calculate()
{
document.Request.totalA.value = dp((document.Request.Qty_A.value)*(document.Request.Price_A.value))
document.Request.totalB.value = dp((document.Request.Qty_B.value)*(document.Request.Price_B.value))
document.Request.totalC.value = dp((document.Request.Qty_C.value)*(document.Request.Price_C.value))
document.Request.totalD.value = dp((document.Request.Qty_D.value)*(document.Request.Price_D.value))
document.Request.totalE.value = dp((document.Request.Qty_E.value)*(document.Request.Price_E.value))
document.Request.totalF.value = dp((document.Request.Qty_F.value)*(document.Request.Price_F.value))
document.Request.totalG.value = dp((document.Request.Qty_G.value)*(document.Request.Price_G.value))
document.Request.totalH.value = dp((document.Request.Qty_H.value)*(document.Request.Price_H.value))
document.Request.Total_Value.value = dp(eval(document.Request.totalA.value) + eval(document.Request.totalB.value)
+ eval(document.Request.totalC.value) + eval(document.Request.totalD.value) + eval(document.Request.totalE.value)
+ eval(document.Request.totalF.value) + eval(document.Request.totalG.value) + eval(document.Request.totalH.value))
}
/*function regExp(ele)
{
d=ele.value.indexOf('.')
dot=/\./g
e=ele.value.substr(0,d+1)
if(d!=-1){e+=ele.value.substr(d+1, ele.value.length).replace(dot,'')}
re=/[^0-9.]+/g
ele.value=e.replace(re,'')
calculate()
}*/
function regExp(ele)
{
d=ele.value.indexOf('.');
dot=/\./g;
if(d!=-1){
e=ele.value.substr(0,d+1);
e+=ele.value.substr(d+1, ele.value.length).replace(dot,'');
}
re=/[^0-9.]+/g;
ele.value=ele.value.replace(re,'');
calculate();
}
</SCRIPT>

Here is an example of a line item:

<TR>
<TD><p align="left"><FONT face="arial, helvetica" size=2>B)</FONT></p></TD>
<TD align=middle><p align="center"><INPUT size=12 name=Item_B value="<%=Session("Item_B")%>"></p></TD>
<TD align=middle><p align="center"><INPUT size=2 name=Qty_B onChange="calculate()" value="<%=Session("QTY_B")%>"></p></TD>
<TD align=middle><p align="center"><INPUT size=18 name=Description_B value="<%=Session("Description_B")%>"></p></TD>
<TD align=middle><p align="center"><INPUT size=10 name=Price_B onChange="regExp(this)" value="<%=Session("Price_B")%>"><FONT
face="arial, helvetica" size=2>EA.</FONT></p></TD>
</TR>

The toaling is done with hidden fields:

<input type="hidden" name="totalA">
<input type="hidden" name="totalB">
<input type="hidden" name="totalC">
<input type="hidden" name="totalD">
<input type="hidden" name="totalE">
<input type="hidden" name="totalF">
<input type="hidden" name="totalG">
<input type="hidden" name="totalH">

Any ideas what is wrong with it to cause it to do this?  Any help is greatly appreciated.