--- a/browser/app/profile/extensions/testpilot@labs.mozilla.com/content/survey-generator.js
+++ b/browser/app/profile/extensions/testpilot@labs.mozilla.com/content/survey-generator.js
@@ -86,16 +86,19 @@ function onBuiltinSurveyLoad() {
   } else {
     contentDiv.innerHTML = "";
     if (task.surveyExplanation) {
       explanation.innerHTML = task.surveyExplanation;
     } else {
       explanation.innerHTML = "";
     }
     drawSurveyForm(task, contentDiv);
+    // Allow surveys to define arbitrary page load handlers - call them
+    // after creating the rest of the page:
+    task.onPageLoad(task, document);
   }
 }
 
 function drawSurveyForm(task, contentDiv) {
   let surveyQuestions = task.surveyQuestions;
 
   /* Fill form fields with old survey answers if available --
    * but not if the survey version has changed since you stored them!!
@@ -109,32 +112,32 @@ function drawSurveyForm(task, contentDiv
   submitButton.setAttribute("style", "");
   let changeButton = document.getElementById("change-answers");
   changeButton.setAttribute("style", "display:none");
   // Loop through questions and render html form input elements for each
   // one.
   for (let i = 0; i < surveyQuestions.length; i++) {
     let question = surveyQuestions[i].question;
     let explanation = surveyQuestions[i].explanation;
-    let elem;
+    let elem, j;
 
     elem = document.createElement("h3");
     elem.innerHTML = (i+1) + ". " + question;
     contentDiv.appendChild(elem);
     if (explanation) {
       elem = document.createElement("p");
       elem.setAttribute("class", "survey-question-explanation");
       elem.innerHTML = explanation;
       contentDiv.appendChild(elem);
     }
     // If you've done this survey before, preset all inputs using old answers
     let choices = surveyQuestions[i].choices;
     switch (surveyQuestions[i].type) {
     case MULTIPLE_CHOICE:
-      for (let j = 0; j < choices.length; j++) {
+      for (j = 0; j < choices.length; j++) {
         let newRadio = document.createElement("input");
         newRadio.setAttribute("type", "radio");
         newRadio.setAttribute("name", "answer_to_" + i);
         newRadio.setAttribute("value", j);
         if (oldAnswers && oldAnswers[i] == String(j)) {
           newRadio.setAttribute("checked", "true");
         }
         let label = document.createElement("span");
@@ -143,17 +146,17 @@ function drawSurveyForm(task, contentDiv
         contentDiv.appendChild(label);
         contentDiv.appendChild(document.createElement("br"));
       }
       break;
     case CHECK_BOXES:
     case CHECK_BOXES_WITH_FREE_ENTRY:
       let checkboxName = "answer_to_" + i;
       // Check boxes:
-      for (let j = 0; j < choices.length; j++) {
+      for (j = 0; j < choices.length; j++) {
         let newCheck = document.createElement("input");
         newCheck.setAttribute("type", "checkbox");
         newCheck.setAttribute("name", checkboxName);
         newCheck.setAttribute("value", j);
         if (oldAnswers && oldAnswers[i]) {
           for each (let an in oldAnswers[i]) {
             if (an == String(j)) {
               newCheck.setAttribute("checked", "true");
@@ -183,17 +186,17 @@ function drawSurveyForm(task, contentDiv
           }, false);
         let label = document.createElement("span");
         label.innerHTML = surveyQuestions[i].free_entry + "&nbsp:&nbsp";
         let inputBox = document.createElement("textarea");
         inputBox.setAttribute("id", freeformId);
         inputBox.addEventListener(
           "keypress", function() {
             let elements = document.getElementsByName(checkboxName);
-            for (let j = (elements.length - 1); j >= 0; j--) {
+            for (j = (elements.length - 1); j >= 0; j--) {
               if (elements[j].value == freeformId) {
                 elements[j].checked = true;
                 break;
               }
             }
           }, false);
         if (oldAnswers && oldAnswers[i]) {
           for each (let an in oldAnswers[i]) {
@@ -208,17 +211,17 @@ function drawSurveyForm(task, contentDiv
         contentDiv.appendChild(label);
         contentDiv.appendChild(inputBox);
       }
       break;
     case SCALE:
       let label = document.createElement("span");
       label.innerHTML = surveyQuestions[i].min_label;
       contentDiv.appendChild(label);
-      for (let j = surveyQuestions[i].scale_minimum;
+      for (j = surveyQuestions[i].scale_minimum;
            j <= surveyQuestions[i].scale_maximum;
            j++) {
         let newRadio = document.createElement("input");
         newRadio.setAttribute("type", "radio");
         newRadio.setAttribute("name", "answer_to_" + i);
         newRadio.setAttribute("value", j);
         if (oldAnswers && oldAnswers[i] == String(j)) {
           newRadio.setAttribute("checked", "true");
@@ -238,17 +241,17 @@ function drawSurveyForm(task, contentDiv
       }
       contentDiv.appendChild(inputBox);
       break;
     case MULTIPLE_CHOICE_WITH_FREE_ENTRY:
       let checked = false;
       let freeformId = "freeform_" + i;
       let radioName = "answer_to_" + i;
 
-      for (let j = 0; j < choices.length; j++) {
+      for (j = 0; j < choices.length; j++) {
         let newRadio = document.createElement("input");
         newRadio.setAttribute("type", "radio");
         newRadio.setAttribute("name", radioName);
         newRadio.setAttribute("value", j);
         newRadio.addEventListener(
           "click", function() {
             let inputBox = document.getElementById(freeformId);
             if (inputBox) {

--- a/browser/app/profile/extensions/testpilot@labs.mozilla.com/modules/tasks.js
+++ b/browser/app/profile/extensions/testpilot@labs.mozilla.com/modules/tasks.js
@@ -956,16 +956,17 @@ TestPilotBuiltinSurvey.prototype = {
                    surveyInfo.surveyName,
                    surveyInfo.surveyUrl,
                    surveyInfo.summary,
                    surveyInfo.thumbnail);
     this._studyId = surveyInfo.uploadWithExperiment; // what study do we belong to
     this._versionNumber = surveyInfo.versionNumber;
     this._questions = surveyInfo.surveyQuestions;
     this._explanation = surveyInfo.surveyExplanation;
+    this._onPageLoad = surveyInfo.onPageLoad;
   },
 
   get taskType() {
     return TaskConstants.TYPE_SURVEY;
   },
 
   get surveyExplanation() {
     return this._explanation;
@@ -983,16 +984,22 @@ TestPilotBuiltinSurvey.prototype = {
   get defaultUrl() {
     return this.currentStatusUrl;
   },
 
   get relatedStudyId() {
     return this._studyId;
   },
 
+  onPageLoad: function(task, document) {
+    if (this._onPageLoad) {
+      this._onPageLoad(task, document);
+    }
+  },
+
   onDetailPageOpened: function TPS_onDetailPageOpened() {
     if (this._status < TaskConstants.STATUS_IN_PROGRESS) {
       this.changeStatus( TaskConstants.STATUS_IN_PROGRESS, true );
     }
   },
 
   get oldAnswers() {
     let surveyResults =