added javascript timeout to reload page after 10 minutes

app/views/reports/review.html.haml

@@ -2,13 +2,16 @@
   = stylesheet_link_tag 'reviews'
 - content_for :javascript do
   = javascript_include_tag :defaults
+  = javascript_tag "var reviewer_timeout;"  # used to reset the reviewer's timeclock for the batch of reports
 
 = render :partial => 'reviewer_alert', :collection => current_user.unviewed_alerts
 
 %h1 Review Interface
 
 %p.clear
-  = link_to_remote content_tag(:span,"Get More Reports"), { :url => assign_reports_path, :method => :post }, :class => "button"
+  = link_to_remote content_tag(:span,"Get More Reports"), |
+    { :url => assign_reports_path, :method => :post,  :after => "startReviewerClock();"}, :class => "button" |
+
 %table
   %tr
     %td{:style => "width: 800px"}

public/javascripts/application.js

@@ -1,4 +1,3 @@
-
 Date.prototype.toISO8601String = function (format, offset) {
     /* accepted values for the format [1-6]:
      1 Year:
@@ -46,3 +45,20 @@ Date.prototype.toISO8601String = function (format, offset) {
     if (format > 3) { str += offset; }
     return str;
 }
+
+/* reload the reviewer page if the reviewer has been looking at the
+   reports for > 10 minutes */
+function startReviewerClock() {
+  if (reviewer_timeout) {
+   clearTimeout(reviewer_timeout);
+  }
+  reviewer_timeout = setTimeout('reviewer_time_limit_reached()', 600000);
+}
+
+function reviewer_time_limit_reached() {
+  alert("You have been looking at these reports " +
+        "for more than 10 minutes. They have been " +
+        "released.  Please reload this page if your " +
+        "browser doesn't do it automatically.");
+  window.location.reload();
+}