// (C) 2000 John M Hanna under the terms of the GPL
// copy freely if you include source!
// script for shopping cart w/ encryption (soon to be)
// put onClick="itemAdd(description, quantity, price)" in your html
// and showItems() to show the cart
// You may need to customize buyItems() for your server
// change this if you're not using dollars
currency="$ "
// if you need descriptions longer than 60 chars change this:
dlen=100
// if your quantity or price need be longer than 6 chars, change this:
qlen=6
plen=6
// if this cookie name conflicts with another javascript cookie, change this
basket="myBasket"
// how do you calculate shipping costs
function shipping(total) {
return total/10; // shipping for us is 10% of total
}
function buyItems() {
window.location="mybuy.html"
}
// change the showItems() function if you don't like how the
// shopping cart looks -- it's at the end of the script
// You shouldn't need to change anything else here until the body...
// have fun!
tlen=(dlen+qlen+plen+dlen)+1
cookie=''
function getCookie() {
if(cookie) return cookie
cookie=document.cookie.substr(document.cookie.indexOf(basket+"=")+1+basket.length)
return cookie
}
function setCookie(c) {
cookie=c
document.cookie=basket+"="+c
}
function doBuy(f) {
// validate fields
var error=''
if(itemCount(getCookie()) == 0){
error+="Your cart is empty.\n"
alert(error);
return false;
}else if(f.billing.value.length < 20){
error+="Please enter a billing address.\n"
f.billing.focus();
alert(error);
return false;
}else if(f.phone.value.length < 10){
error+="Please enter a phone number with area code.\n"
f.phone.focus();
alert(error);
return false;
}else if(f.email.value.indexOf('@')<0){
f.email.focus();
error+="Please enter a valid email address\n"
alert(error);
return false;
}else{
/* var order=cartString() +"\n\
Phone: "+f.phone.value+"\n\
E-mail: "+f.email.value+"\n\
Fax: "+f.fax.value+"\n\
\n Billing address:\n"+f.billing.value+"\n\n\
\n Shipping Address:\n"+f.shipping.value+"\n\n\
\n Comments:\n"+f.comments.value*/
return true;
}
}
function itemCount(c) { // return number of items in basket
n=Math.floor(c.length/tlen);
return Math.floor(c.length/tlen)
}
function chop(s,start,end) { return s.substr(0,start)+s.substr(end) }
function delItem(n) {
setCookie(chop(getCookie(),n*tlen,(n+1)*tlen))
refresh()
}
function fetch(s,n) { return s.substr(n*tlen,tlen) }
function itemDescription(n) { // n=item number
return fetch(getCookie(),n).substr(0,dlen)
}
function itemQuantity(n) {
return fetch(getCookie(),n).substr(dlen,qlen)
}
function itemPrice(n) {
return fetch(getCookie(),n).substr(dlen+qlen,plen)
}
function itemSize(n) {
return fetch(getCookie(),n).substr(dlen+qlen+plen,dlen)
}
function pad(s,n) {
var i=n-s.length
while(i-- > 0) { s+=" " }
return s.substr(0,n)
}
function itemqSet(n,q) { // just change quantity
q=pad(q,qlen)
cookie=getCookie()
setCookie(cookie.substr(0,n*tlen+dlen)+q+cookie.substr((n+1)*tlen-plen-1))
}
function itemSet(n,d,q,p,s) { // description, quantity, price
var str=pad(d,dlen)+pad(q,qlen)+pad(p,plen)+pad(s,dlen)
cookie=getCookie()
setCookie(cookie.substr(0,n*tlen)+str+"_"+cookie.substr((n+1)*tlen))
}
function itemAdd(d,q,p,s) {
itemSet(itemCount(getCookie()),d,q,p,s);
// refresh()
}
function emptyCart() {
setCookie('')
refresh()
}
function refresh() {
window.location.reload()
}
function money(v) {
v=Math.round(parseFloat(v)*100)
v=String(v)
var l=v.length-2
v=v.substring(0,l)+"."+v.substring(l)
return currency+" "+v
}
function showItems() {
var n, m=itemCount(getCookie())
t=0
if(m==0) {
document.writeln('Your cart is empty')
} else {
document.writeln('\
\
Your Cart:\
\
\
')
}
}
function cartString() {
var n, m=itemCount(getCookie())
var r=''
t=0
if(m==0) {
return('Empty shopping cart.')
} else {
for(n=0; n 19)
return (false);
var sum = 0, mul = 1, i; var digit
for (i=st.length-1; i>=0; i--) {
digit=st.charCodeAt(i)-48
if(digit <= 9 && digit >=0) {
digit *=mul;
if(digit > 9) digit=digit % 10 +1
sum += digit
mul ^=3
}
}
return ((sum % 10) == 0)
}
/*
==================================================================
LTrim(string) : Returns a copy of a string without leading spaces.
==================================================================
*/
function LTrim(str)
/*
PURPOSE: Remove leading blanks from our string.
IN: str - the string we want to LTrim
*/
{
var whitespace = new String(" \t\n\r");
var s = new String(str);
if (whitespace.indexOf(s.charAt(0)) != -1) {
// We have a string with leading blank(s)...
var j=0, i = s.length;
// Iterate from the far left of string until we
// don't have any more whitespace...
while (j < i && whitespace.indexOf(s.charAt(j)) != -1)
j++;
// Get the substring from the first non-whitespace
// character to the end of the string...
s = s.substring(j, i);
}
return s;
}
/*
==================================================================
RTrim(string) : Returns a copy of a string without trailing spaces.
==================================================================
*/
function RTrim(str)
/*
PURPOSE: Remove trailing blanks from our string.
IN: str - the string we want to RTrim
*/
{
// We don't want to trip JUST spaces, but also tabs,
// line feeds, etc. Add anything else you want to
// "trim" here in Whitespace
var whitespace = new String(" \t\n\r");
var s = new String(str);
if (whitespace.indexOf(s.charAt(s.length-1)) != -1) {
// We have a string with trailing blank(s)...
var i = s.length - 1; // Get length of string
// Iterate from the far right of string until we
// don't have any more whitespace...
while (i >= 0 && whitespace.indexOf(s.charAt(i)) != -1)
i--;
// Get the substring from the front of the string to
// where the last non-whitespace character is...
s = s.substring(0, i+1);
}
return s;
}
/*
=============================================================
Trim(string) : Returns a copy of a string without leading or trailing spaces
=============================================================
*/
function Trim(str)
/*
PURPOSE: Remove trailing and leading blanks from our string.
IN: str - the string we want to Trim
RETVAL: A Trimmed string!
*/
{
return RTrim(LTrim(str));
}