ClickFunnels_Auto_Select_Product_on_Order_Form.js

// AUTO-SELECT CLICKFUNNELS PRODUCT ON ORDER PAGE
// --
// 
// AUTHOR: Robert Klubenspies (klubenspies.com)
// 
// REQUIREMENTS: jQuery
// 
// USAGE:
// 1) Find your product's ID numbers by using Web Inspector to find
//    the code for your order page's radio buttons. They'll look
//    something like the sample below, and have a ID number in the
//    value field. You'll need to know which numbers correspond with
//    which products.
// 
//         <input type="radio" name="purchase[product_id]" value=
//         "595243" data-storage="false">
// 
// 2) Add all of this code to your order page's custom JS/jQuery
// 
// 3) Link to your order page using the following URL format when you
//    need to auto-select a product, based on the ID numbers you
//    determined earlier:
// 
//         https://order.example.com/order-form?product=PRODUCT_ID_NUMBER
// 
// NOTES:
// * This is a hack. Always test it on your page before relying on it.
// * You might need to wrap this code in a $(function(){    }); jQuery
//   function to get it to run on page load.

// Tool to read URL parameters (Credit: http://stackoverflow.com/a/25359264)
$.urlParam=function(n){var e=new RegExp("[?&]"+n+"=([^&#]*)").exec(window.location.href);return null==e?null:e[1]||0};

// Select the correct product's radio button using the product's id number
$('input:radio[name="purchase[product_id]"][value="' + $.urlParam('product') +'"]').prop('checked', true);