Re-work some of the JavaScript for prefs so that Mozilla just "does the right thing."

security/psm/ui/psm_ui.properties.in

@@ -1115,7 +1115,16 @@ function makeBoolPrefHTML(d, nm, vrbl)
     if (vrbl == true) {
         d.write('checked ');
     }
-    d.write('onClick="top.' + nm + ' = checked;"></td>');
+    d.write('onClick="top.togglePrefBool(' + nm + ');"></td>');
+}
+
+function togglePrefBool(nm, newVal)
+{
+   if (top[nm.name]) {
+      top[nm.name] = false;
+   } else {
+      top[nm.name] = true;
+   }
 }
 
 // makes the default email cert selected