ordering.js

 'click .reorder-item-button': function() {
     var Service = 'Service=AWSECommerceService',
         AWSAccessKeyId = 'AWSAccessKeyId=#####',
         AssociateTag = 'AssociateTag=#####',
         Operation = 'Operation=CartCreate',
         Item1OfferListingId = 'Item.1.OfferListingId=B000062TU1',
         Item1ASIN = 'Item.1.ASIN=' + this.ASIN,
         Item1Quantity = 'Item.1.Quantity=2',
         today = new Date(),
         Timestamp = 'Timestamp=' + today.toISOString(),
         Signature = 'Signature=',
         ResponseGroup = 'ResponseGroup=Cart';

     var rawUriParameters = Service + '&' + AWSAccessKeyId + '&' + AssociateTag + '&' + Operation + '&' + Item1ASIN + '&' + Item1Quantity + '&' + ResponseGroup + '&' + Timestamp;
     console.log('rawUriParameters: \n' + rawUriParameters);

     function encodeUriParameters(str) {
         return encodeURIComponent(str).replace(/[!'()*]/g, function(c) {
             return '%' + c.charCodeAt(0).toString(16);
         });
     }

     var encodedUriParameters = encodeUriParameters(rawUriParameters);
     console.log('encodedUriParameters: \n' + encodedUriParameters);

     function addLineBreaksToEncodedURI(str) {
         var paramaterArray = str.split("%26");
         paramaterArray.sort();

         var parameterStringified = '';
         for (var i = 0; i < paramaterArray.length; i++) {
             if (i < paramaterArray.length - 1) {
                 parameterStringified += paramaterArray[i] + "\n";
             } else {
                 parameterStringified += paramaterArray[i];
             }
         }
         return parameterStringified.replace(/%3D/g, "=");
     }

     var uriWithLineBreaks = addLineBreaksToEncodedURI(encodedUriParameters);
     console.log('uriWithLineBreaks: \n' + uriWithLineBreaks);

     function reconstructUriWithAmpersands(str) {
         return str.replace(/\n/g, "&");
     }

     var uriReconstructedWithAmpersands = reconstructUriWithAmpersands(uriWithLineBreaks);
     console.log('uriReconstructedWithAmpersands: \n' + uriReconstructedWithAmpersands);

     function addRequiredLinesBeforeSigning(str) {
         return 'GET\n' + 'webservices.amazon.com\n' + '/onca/xml\n' + str;
     }

     console.log('addRequiredLinesBeforeSigning: ' + '\n' + addRequiredLinesBeforeSigning(uriReconstructedWithAmpersands));

     var rawHash = CryptoJS.HmacSHA256(addRequiredLinesBeforeSigning(uriReconstructedWithAmpersands), '#####').toString();
     console.log('rawHash: \n' + rawHash);
     var encodedHash = encodeUriParameters(rawHash);
     console.log('encodedHash: \n' + encodedHash + '\n');
     console.log('http://webservices.amazon.com/onca/xml?' + uriReconstructedWithAmpersands + '&' + Signature + encodedHash);
 }