diff --git a/scribblings/cs19.scrbl b/scribblings/cs19.scrbl
index 15060a3..79d7912 100644
--- a/scribblings/cs19.scrbl
+++ b/scribblings/cs19.scrbl
@@ -165,7 +165,7 @@ Write a file called @filepath{tick-tock.rkt} with the following content.
 
 ;; draw: world view -> view
 (define (draw world dom)
-  (update-view-text (view-focus dom "#counter") world))
+  (update-view-text (view-focus dom "counter") world))
 
 
 ;; tick: world view -> world
@@ -333,7 +333,7 @@ function will be called every time an event occurs.
 
 ;; draw: world view -> view
 (define (draw world dom)
-  (update-view-text (view-focus dom "#name-span")
+  (update-view-text (view-focus dom "name-span")
                     (world-name world)))
 ...
 (big-bang ...
@@ -359,19 +359,13 @@ Common values for @racket[x] include @tech{resource}s.
 
 
 
-@defproc[(view-focus? [v view] [selector String]) boolean]{
-Return true if the view can be focused using the given selector.
-
-Selectors are currently restricted to @litchar{#id} selectors for the
-moment.
+@defproc[(view-focus? [v view] [id String]) boolean]{
+Return true if the view can be focused using the given id.
 }
 
-@defproc[(view-focus [v view] [selector String]) view]{
-Focuses the view on an element, given the @racket[selector].  The view
+@defproc[(view-focus [v view] [id String]) view]{
+Focuses the view on an element, given the @racket[id].  The view
 will be searched starting from the toplevelmost node.
-
-Selectors are currently restricted to @litchar{#id} selectors for the
-moment.
 }
 
 
diff --git a/scribblings/manual.scrbl b/scribblings/manual.scrbl
index 925c1a9..cea2183 100644
--- a/scribblings/manual.scrbl
+++ b/scribblings/manual.scrbl
@@ -561,7 +561,7 @@ Write a file called @filepath{tick-tock.rkt} with the following content.
 
 ;; draw: world view -> view
 (define (draw world dom)
-  (update-view-text (view-focus dom "#counter") world))
+  (update-view-text (view-focus dom "counter") world))
 
 
 ;; tick: world view -> world
@@ -709,7 +709,7 @@ function will be called every time an event occurs.
 
 ;; draw: world view -> view
 (define (draw world dom)
-  (update-view-text (view-focus dom "#name-span")
+  (update-view-text (view-focus dom "name-span")
                     (world-name world)))
 ...
 (big-bang ...
@@ -734,12 +734,14 @@ Common values for @racket[x] include @tech{resource}s.
 }
 
 
-@defproc[(view-focus [v view] [selector String]) view]{
-Focuses the view on an element, given the @racket[selector].  The view
-will be searched starting from the toplevelmost node.
+@defproc[(view-focus? [v view] [id String]) boolean]{
+Return true if the view can be focused using the given id.
+}
 
-Selectors are currently restricted to @litchar{#id} selectors for the
-moment.
+
+@defproc[(view-focus [v view] [id String]) view]{
+Focuses the view on an element, given the @racket[id].  The view
+will be searched starting from the toplevelmost node.
 }
 
 
diff --git a/tests/more-tests/sharing.rkt b/tests/more-tests/sharing.rkt
index 7973de8..55ebb7a 100644
--- a/tests/more-tests/sharing.rkt
+++ b/tests/more-tests/sharing.rkt
@@ -59,7 +59,7 @@
 
 
 
-(define-struct person (name friends) #:mutable)
+(define-struct person (name friends))
 (let-values ([(a b c)
               (shared ([a (make-person "jill" (list b c))]
                        [b (make-person "jack" (list a c))]
diff --git a/web-world/examples/attr-animation/attr-animation.rkt b/web-world/examples/attr-animation/attr-animation.rkt
index 9e4e1bd..4e8463b 100644
--- a/web-world/examples/attr-animation/attr-animation.rkt
+++ b/web-world/examples/attr-animation/attr-animation.rkt
@@ -10,10 +10,10 @@
   (modulo (add1 w) 10))
 
 
-;; pick-block: world view -> view
+;; pick-block: view number -> view
 ;; Focus the view on block i.
 (define (pick-block v i)
-  (view-focus v (format "#~a" i)))
+  (view-focus v (format "~a" i)))
 
 
 (define (draw w v)
diff --git a/web-world/examples/attr-animation/index.html b/web-world/examples/attr-animation/index.html
index 14cf68a..b10f59b 100644
--- a/web-world/examples/attr-animation/index.html
+++ b/web-world/examples/attr-animation/index.html
@@ -39,7 +39,7 @@ The program for this is:
 ;; pick-block: world view -> view
 ;; Focus the view on block i.
 (define (pick-block v i)
-  (view-focus v (format "#~a" i)))
+  (view-focus v (format "~a" i)))
 
 
 (define (draw w v)
diff --git a/web-world/examples/dwarves-with-remove/dwarves-with-remove.rkt b/web-world/examples/dwarves-with-remove/dwarves-with-remove.rkt
index 89fcc00..941e137 100644
--- a/web-world/examples/dwarves-with-remove/dwarves-with-remove.rkt
+++ b/web-world/examples/dwarves-with-remove/dwarves-with-remove.rkt
@@ -26,8 +26,8 @@
 ;; until we're all done.
 (define (draw w dom-view)
   (foldl (lambda (name view)
-           (cond [(view-focus? view (format "#~a" name))
-                  (define focused (view-focus view (format "#~a" name)))
+           (cond [(view-focus? view name)
+                  (define focused (view-focus view name))
                   (cond
                    [(member name w)
                     view]
@@ -44,7 +44,7 @@
 ;; to each name here.
 (define my-view
   (foldl (lambda (name view)
-           (view-bind (view-focus view (format "#~a" name))
+           (view-bind (view-focus view name)
                       "click"
                       hide-on-click))
          (->view index.html)
diff --git a/web-world/examples/dwarves/dwarves.rkt b/web-world/examples/dwarves/dwarves.rkt
index 29675c9..f02f65b 100644
--- a/web-world/examples/dwarves/dwarves.rkt
+++ b/web-world/examples/dwarves/dwarves.rkt
@@ -26,7 +26,7 @@
 ;; until we're all done.
 (define (draw w dom-view)
   (foldl (lambda (name view)
-           (define focused (view-focus view (format "#~a" name)))
+           (define focused (view-focus view name))
            (cond
             [(member name w)
              (view-show focused)]
@@ -41,7 +41,7 @@
 ;; to each name here.
 (define my-view
   (foldl (lambda (name view)
-           (view-bind (view-focus view (format "#~a" name))
+           (view-bind (view-focus view name)
                       "click"
                       hide-on-click))
          (->view index.html)
diff --git a/web-world/examples/field/field.rkt b/web-world/examples/field/field.rkt
index 973d60b..023bf3e 100644
--- a/web-world/examples/field/field.rkt
+++ b/web-world/examples/field/field.rkt
@@ -11,18 +11,18 @@
 ;; When the user clicks on the button, grab at the text of the
 ;; text-field.
 (define (on-click w button-view)
-  (view-form-value (view-focus button-view "#text-field")))
+  (view-form-value (view-focus button-view "text-field")))
 
 
 ;; draw: world view -> view
 ;; Take the view, and replace the template with the world value.
 (define (draw w dom)
-  (update-view-text (view-focus dom "#template")
+  (update-view-text (view-focus dom "template")
                     w)) 
 
 
 (define my-view (view-bind (view-focus (->view index.html) 
-                                       "#button")
+                                       "button")
                            "click"
                            on-click))
 
diff --git a/web-world/examples/redirected/redirected.rkt b/web-world/examples/redirected/redirected.rkt
index 51101f3..4dc7b81 100644
--- a/web-world/examples/redirected/redirected.rkt
+++ b/web-world/examples/redirected/redirected.rkt
@@ -9,7 +9,7 @@
 
 ;; draw: world view -> view
 (define (draw w v)
-  (update-view-text (view-focus v "#counter") w))
+  (update-view-text (view-focus v "counter") w))
 
 
 
diff --git a/web-world/examples/tick-tock/tick-tock.rkt b/web-world/examples/tick-tock/tick-tock.rkt
index bb67aeb..f042530 100644
--- a/web-world/examples/tick-tock/tick-tock.rkt
+++ b/web-world/examples/tick-tock/tick-tock.rkt
@@ -7,7 +7,7 @@
 
 ;; draw: world view -> view
 (define (draw w v)
-  (update-view-text (view-focus v "#counter") w))
+  (update-view-text (view-focus v "counter") w))
 
 
 
diff --git a/web-world/examples/todo/todo.rkt b/web-world/examples/todo/todo.rkt
index ec94700..3e5b8ca 100644
--- a/web-world/examples/todo/todo.rkt
+++ b/web-world/examples/todo/todo.rkt
@@ -36,7 +36,7 @@
 
 ;; world view -> world
 (define (on-add world view)
-  (local [(define text (view-form-value (view-focus view "#next-item")))]
+  (local [(define text (view-form-value (view-focus view "next-item")))]
     (cons (new-item text) world)))
 
 
@@ -50,8 +50,8 @@
 ;; refresh-item-in-view: item view -> view
 (define (refresh-item-in-view item view)
   (cond
-   [(view-focus? view (format "#~a" (item-id item)))
-    (update-view-css (view-focus view (format "#~a" (item-id item)))
+   [(view-focus? view (item-id item))
+    (update-view-css (view-focus view (item-id item))
                      "text-decoration"
                      (cond [(item-finished? item)
                             "line-through"]
@@ -59,7 +59,7 @@
                             "none"]))]
    [else
     (view-bind
-     (view-append-child (view-focus view "#items")
+     (view-append-child (view-focus view "items")
                         (xexp->dom `(li (@ (id ,(item-id item)))
                                         ,(item-content item))))
      "click"
@@ -74,7 +74,7 @@
   
 
 (define the-view
-  (view-bind (view-focus (->view index.html) "#add-button")
+  (view-bind (view-focus (->view index.html) "add-button")
              "click"
              on-add))
 
diff --git a/web-world/examples/where-am-i/where-am-i.rkt b/web-world/examples/where-am-i/where-am-i.rkt
index f0db836..7f551ea 100644
--- a/web-world/examples/where-am-i/where-am-i.rkt
+++ b/web-world/examples/where-am-i/where-am-i.rkt
@@ -23,13 +23,13 @@
 
 (define (draw world dom)
   (define v1 (if (coord? (world-real world))
-                 (update-view-text (view-focus dom "#real-location")
+                 (update-view-text (view-focus dom "real-location")
                                    (format "lat=~a, lng=~a"
                                            (coord-lat (world-real world))
                                            (coord-lng (world-real world))))
                  dom))
   (define v2 (if (coord? (world-mock world))
-                 (update-view-text (view-focus v1 "#mock-location")
+                 (update-view-text (view-focus v1 "mock-location")
                                    (format "lat=~a, lng=~a"
                                            (coord-lat (world-mock world))
                                            (coord-lng (world-mock world))))
diff --git a/web-world/js-impl.js b/web-world/js-impl.js
index 1274cc5..c98ee57 100644
--- a/web-world/js-impl.js
+++ b/web-world/js-impl.js
@@ -72,14 +72,11 @@
     
 
     // For the moment, we only support selection by id.
-    var idRegexp = new RegExp("^#");
     var selectorMatches = function(selector, node) {
-        if (selector.match(idRegexp)) {
-            if (node.nodeType === 1) {
-                return node.getAttribute('id') === selector.substring(1);
-            } else {
-                return false;
-            }
+        if (node.nodeType === 1) {
+            return node.getAttribute('id') === selector;
+        } else {
+            return false;
         }
         return false;
     };
@@ -107,6 +104,7 @@
                             this.nonce);
     };
 
+
     MockView.prototype.updateFocus = function(selector) {
         selector = selector.toString();
         return this.act(
@@ -125,7 +123,7 @@
             },
             function(eventHandlers) { return eventHandlers; },
             function(view) {
-                view.focus = view.top.find(selector);
+                view.focus = $(document.getElementById(selector));
             }
         );
     };