// JavaScript Document
function nwts(s) { // no white space
return s.replace(/\s+/g, '');
}
function trimwts(s) { // trim white space
return s.replace(/^\s+|\s+$/g, '');
}

function number(s) { // any number, including exponent
s = nwts(s)-0;
err = isNaN(s) ? 10 : 0;
return [err ? 0 : s];
}

function tel(s) { // telephone, with area code + opt prefixes
var a = s.replace(/\D+/g, '-');
a = a.match(/(\d+-?)*(\d{3}-?){2}\d{4}/g);
err = a != null && a.length ? 0 : 2;
return a;
}

/* this code is copied from
http://www.codelib.net/home/jkm/checksum.js */
function checksum(s) { // thanks to daniel_amor@hp.com for AMEX specs
var p=0, e=8, t=0, c=[], r=0, l=0, i;
if (s.length != 16) {
t = 1;
e = s.length == 13 && 6 || s.length == 15 && 7;
}
for (i=p; i<e; i++)
r += (c[i] = s.charAt(i*2+t) * 2) > 9
? Math.floor(c[i]/10 + c[i]%10)
: c[i];
for (i=p; i<e+t; i++) l += s.charAt(i*2+1-t)-0;
l += r;
return e && l%10 == 0;
}

function text(s) {
s = trimwts(s);
err = s.length ? 0 : 5;
return [s];
}

function words(s) {
s = trimwts(s);
err = /\s/.test(s) ? 0 : 9;
return [s];
}

function email(s) {
a = s.match(/\S+@([-\w]+\.)+\w+/g);
err = a != null && a.length ? 0 : 6;
return a;
}

function valid(element, check) {
if (element.type == 'text' || element.type == 'textarea' || element.type == 'select-one') {
return check(element.value);
} else return check(element);
}

present_element = null, present_error = null;
function validate(form, list) {
for (i=0; i<form.elements.length; i++) {
var element = form.elements[i];
var n = element.name, out;
if (list[n] && list[n].verify) {
out = valid(element, list[n].verify);
if (err &&
(list[n].force || present_element != element || present_error != err)) {
present_error = err;
present_element = element;
alert(list[n].message || errc[err]);
element.focus();
return false;
} else if (!err && list[n].filter)
element.value = out.join(', ');
}
}
//alert('Your form has been submitted. Thank You!');
return true;
}

order_check = {

app_name:
{ verify: text, message: 'Please enter your name.' },

app_hphone:
{ verify: tel, message: 'Please enter your home phone number with area code.' },

app_email:
{ verify: email, message: 'Please enter your email address.' }

};