diff --git a/app/assets/javascripts/angular/controllers/experiments.js b/app/assets/javascripts/angular/controllers/experiments.js
index 45750c28..c9ed2b04 100644
--- a/app/assets/javascripts/angular/controllers/experiments.js
+++ b/app/assets/javascripts/angular/controllers/experiments.js
@@ -160,10 +160,16 @@
                 $scope.stepResults.startTime  = Date.now();
             };
 
-            $scope.startTimer = function() {
+            $scope.endTimer = function() {
                 $scope.stepResults.endTime  = Date.now();
             };
 
+            $scope.showInstructions = true;
+            $scope.start = function() {
+                $scope.showInstructions = false;
+                $scope.startTimer();
+            };
+
             $scope.SPECTROGRAM_WIDTH = 1080;
             var PPS = 45;
             $scope.flashes = [];
diff --git a/app/assets/templates/rapid_scanning_experiment.html b/app/assets/templates/rapid_scanning_experiment.html
index 12153df7..a718acda 100644
--- a/app/assets/templates/rapid_scanning_experiment.html
+++ b/app/assets/templates/rapid_scanning_experiment.html
@@ -10,14 +10,14 @@
 
     <div class="experimentContainer">
 
-        <div id="instructions" >
+        <div id="instructions" ng-show="showInstructions" >
             <div>
                 <img src="/experiment_assets/Instructions.jpg">
             </div>
-            <button>I understand the instructions</button>
+            <button ng-click="start()">I understand the instructions</button>
         </div>
 
-        <div>
+        <div ng-show="!showInstructions">
             <div ng-show="bigScope.step == $index">
 
                 <div>
diff --git a/lib/assets/javascripts/functions.js b/lib/assets/javascripts/functions.js
index f7adf4a4..a458dc82 100644
--- a/lib/assets/javascripts/functions.js
+++ b/lib/assets/javascripts/functions.js
@@ -267,7 +267,7 @@ if (!Array.prototype.filter)
                 });
                 return parts.length ? parts.join('&') : '';
             };
-            function encodeUriQuery(val, pctEncodeSpaces) {
+            this.encodeUriQuery = function encodeUriQuery(val, pctEncodeSpaces) {
                 val = val || "";
                 return encodeURIComponent(val).
                     replace(/%40/gi, '@').
@@ -275,7 +275,7 @@ if (!Array.prototype.filter)
                     replace(/%24/g, '$').
                     replace(/%2C/gi, ',').
                     replace((pctEncodeSpaces ? null : /%20/g), '+');
-            }
+            };
 
             this.isUndefined = function isUndefined(value) {
                 return typeof value == 'undefined';