diff --git a/example2.html b/example2.html
new file mode 100644
index 0000000..3b5cdbc
--- /dev/null
+++ b/example2.html
@@ -0,0 +1,61 @@
+<html>
+<head>
+  <title>scroll-to - smooth javascript element scrolling with requestAnimationFrame</title>
+  <style>
+    body {
+      padding: 50px;
+    }
+
+    ul {
+      min-width: 1500px;
+    }
+    
+    #wrapper {
+      overflow: auto;
+      height: 300px;
+      width: 300px;
+    }
+
+    ul li {
+      margin: 10px;
+      padding: 5px;
+      list-style: none;
+      display: block;
+      float: left;
+      width: 100px;
+      height: 100px;
+      border: 1px solid #eee;
+      text-align: center;
+      line-height: 100px;
+    }
+  </style>
+</head>
+<body>
+  <div id="wrapper">
+    <ul></ul>
+  </div>
+  <script src="build/build.js"></script>
+
+  <script>
+    var scroll = require('scroll-to');
+    var events = require('event');
+    var ul = document.querySelector('ul');
+    var wrapper = document.querySelector('#wrapper');
+
+    for (var i = 0; i < 500; i++) {
+      var li = document.createElement('li');
+      li.textContent = 'item ' + i;
+      ul.appendChild(li);
+    }
+
+    events.bind(window, 'click', function(e){
+      var x = e.pageX - wrapper.getBoundingClientRect().left;
+      var y = e.pageY - wrapper.getBoundingClientRect().top;
+      console.log('scrolling to (%s, %s)', x, y);
+      scroll(x, y, {
+        box: wrapper
+      });
+    });
+  </script>
+</body>
+</html>
diff --git a/index.js b/index.js
index 152e777..201451a 100644
--- a/index.js
+++ b/index.js
@@ -23,8 +23,13 @@ function scrollTo(x, y, options) {
   options = options || {};
 
   // start position
-  var start = scroll();
-
+  var start = scroll(options.box);
+  
+  if (options.box) {
+    y += options.box.scrollTop || 0;
+    x += options.box.scrollLeft || 0;
+  }
+  
   // setup tween
   var tween = Tween(start)
     .ease(options.ease || 'out-circ')
@@ -33,7 +38,11 @@ function scrollTo(x, y, options) {
 
   // scroll
   tween.update(function(o){
-    window.scrollTo(o.left | 0, o.top | 0);
+    if (options.box) {
+      options.box.scrollTop = o.top;
+      options.box.scrollLeft = o.left;
+    }
+    else window.scrollTo(o.left | 0, o.top | 0);
   });
 
   // handle end
@@ -59,8 +68,8 @@ function scrollTo(x, y, options) {
  * @api private
  */
 
-function scroll() {
-  var y = window.pageYOffset || document.documentElement.scrollTop;
-  var x = window.pageXOffset || document.documentElement.scrollLeft;
+function scroll(box) {
+  var y = (box && box.scrollTop) || this.pageYOffset || document.documentElement.scrollTop;
+  var x = (box && box.scrollLeft) || this.pageXOffset || document.documentElement.scrollLeft;
   return { top: y, left: x };
-}
+}
\ No newline at end of file
