// these variables control prices for each type of photo 
var price_PhotoCard   = 3.5;
var price_8x10  = 15;
var price_8x12  = 20;
var price_9x12  = 25;
var price_11x14  = 45; 
var price_12x18  = 60;

// these values get added to the cost, depending on the type of photo
//var price_photographic = 0;  // default
var price_inkjet = 0;

function add_to_cart_submit () {
  var size = document.forms.form_add.os0.value;
  //alert ("comp1 = " + (size=='4x6'));
  var amount = -1;
  if (size == 'Photo card') amount = price_PhotoCard;;
  if (size == '8x10') amount = price_8x10;
  if (size == '8x12') amount = price_8x12;
  if (size == '9x12') amount = price_9x12; 
  if (size == '11x14') amount = price_11x14;
  if (size == '12x18') amount = price_12x18;
//  var type = document.forms.form_add.os1.value;
//  if (type == 'Photographic') amount += price_photographic;
//  else amount += price_inkjet;
    amount += price_inkjet;
  document.forms.form_add.amount.value = amount;
  document.forms.form_add.submit ();
  return false;
}

function output_business_line () {
  // output the line:
  //   <input type="hidden" name="business" value="president@whitehouse.gov">
  var email_p1 = 'rdenney';
  var email_p2 = 'houston.r';
  var email_p3 = 'r.com';
  var email = email_p1 + '@' + email_p2 + email_p3;
  document.write ("<input type='hidden' name='business' value='"+email+"'>\n");
}