pplease help me-with this part of code for a cart

[jinthu200]

here is the code for my cart. it is weird, i dont want "Decimal" quantity multiplying the price. how do change that so if someone inputs 1.5 as quantity it five sout an error. here is the code:


function MakeTen(expr,decimal){

var str="" + Math.round(eval(expr) * Math.pow(10,decimal))

while (str.length <= decimal){

str = "0" + str

}

var decpoint = str.length - decimal

return str.substring(0,decpoint) + "." + str.substring(decpoint,str.length);

}



function MakeTwo(expr){

return "$" + MakeTen(expr,2)

}



function cartMe() {

index = document.cookie.indexOf("MyCart");

countbegin = (document.cookie.indexOf("=", index) + 1);

countend = document.cookie.indexOf(";", index);

if (countend == -1) {

countend = document.cookie.length;

}

fulllist = document.cookie.substring(countbegin, countend);

totprice = 0;

document.write('<TABLE BORDER=1 CELLSPACING=2 CELLPADDING=2 BGCOLOR=adcfdc>');

document.write('<TR><TD><b>Qty</b></TD><TD><b>Product</b></TD><TD><FONT COLOR="#FFFFFF">.</FONT></TD><TD><b>Price</b></TD><td><b>Sub total</b></TD><TD><FONT COLOR="#FFFFFF">.</FONT></TD></TR>');

itemlist = 0;

for (var i = 0; i <= fulllist.length; i++) {

if (fulllist.substring(i,i+1) == '[') {

itemstart = i+1;

}

else if (fulllist.substring(i,i+1) == ']') {

itemend = i;

thequantity = fulllist.substring(itemstart, itemend);

itemtotal = 0;

itemtotal = (eval(theprice*thequantity));

temptotal = itemtotal * 100;

totprice = totprice + itemtotal;

itemlist=itemlist+1;

document.write('<tr><td align=middle>'+thequantity+'</td><td align=left>'+theitem+'</td><td align=right>'+theoption+'</td><td align=right>$'+theprice+'</td><td align=right>'+top.menu.MakeTwo(itemtotal)+'</td><td><a href="javascript:removeItem('+itemlist+')">Remove</a></td></tr>');

}

else if (fulllist.substring(i,i+1) == ',') {

theitem = fulllist.substring(itemstart, i);

itemstart = i+1;

}

else if (fulllist.substring(i,i+1) == '^') {

theprice = fulllist.substring(itemstart, i);

itemstart = i+1;

}

else if (fulllist.substring(i,i+1) == '~') {

theoption = fulllist.substring(itemstart, i);

itemstart = i+1;

}

}

document.write('<tr><td align=right colspan=4><b>Total</b></td><td align=right>'+top.menu.MakeTwo(totprice)+'</td><TD><FONT COLOR="#FFFFFF">.</FONT></TD></tr>');

document.write('</TABLE>');

}

[ShawnDev]

I don't understand the question. Do you not want the user to be able to enter quantities that are not whole numbers? Or do you not want to format the price as a 2-place decimal ($0.00)?

[jinthu200]

I dont want the customer enter like 1.5 as quantity...quantity has to be a whole number compare to the price. Do you now what i am tlaking about.

[ShawnDev]

Originally posted by jinthu200
I dont want the customer enter like 1.5 as quantity...quantity has to be a whole number compare to the price. Do you now what i am tlaking about.

Yes. But the code that handles user input is not part of what you provided. You will have to add code there (not here) to report an error and disallow the entry of fractional numbers.

[jinthu200]

<TD ALIGN="RIGHT" width="49" height="122">$49.00</TD>
<TD width="29" height="122">
<INPUT TYPE="TEXT" NAME="he002quantone1" VALUE="1" SIZE="3"></TD>
<TD width="100" height="122">
&nbsp;<i><INPUT TYPE="BUTTON" NAME="he001add1" VALUE="Add to Cart" ONCLICK="top.menu.buyItem('Black Handbag','49.00', document.itemsform.he001quantone.value, document.itemsform.he001option.value)"><TR ALIGN=Left VALIGN=Bottom>
<TD width="72" height="25" valign="top">
<a href="images/blue.jpg">
<img border="0" src="images/blue.jpg" width="146" height="218"></a></TD>

[ShawnDev]

function ValidateForm()
{
// if (document.itemsform.he001quantone.value is fractional)
&nbsp;&nbsp;{
&nbsp;&nbsp;&nbsp;&nbsp;alert("You must enter a whole number");
&nbsp;&nbsp;&nbsp;&nbsp;return false;
&nbsp;&nbsp;}
//else
&nbsp;&nbsp;{
&nbsp;&nbsp;&nbsp;&nbsp;return true;
&nbsp;&nbsp;}
}
...
<form name="itemsform" ... onSubmit="return ValidateForm();">

[mpoincare]

I assume that you have a text box field named for example 'txtQty', you can use a function like this to make sure the user doesn't enter decimal value (1.5 for instance) as quantity:
function validNumbers(sStr)
{
var sValidNumbers = "1234567890"
var bReturn = true
var i = new Number(0);
while ((bReturn) && (i < sStr.length))
{
bReturn = (sValidNumbers.indexOf(sStr.charAt(i)) >= 0)
i++
}
return (bReturn)
}

Here is the way you can call the function:

if (validNumbers(txtQty)==false))
{alert("Invalid Quantity);}

This function will make sure that the user enter a valid quantity which is a decimal value.