// (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=60
// 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.htm"
}
// 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)+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 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 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) { // description, quantity, price
var s=pad(d,dlen)+pad(q,qlen)+pad(p,plen)
cookie=getCookie()
setCookie(cookie.substr(0,n*tlen)+s+"_"+cookie.substr((n+1)*tlen))
}
function itemAdd(d,q,p) {
itemSet(itemCount(getCookie()),d,q,p);
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)
}