diff --git a/jquery.appear.js b/jquery.appear.js
index ff0b764..83c6d1d 100644
--- a/jquery.appear.js
+++ b/jquery.appear.js
@@ -15,50 +15,64 @@
   var check_lock = false;
   var defaults = {
     interval: 250,
-    force_process: false
-  }
+    force_process: false,
+    left_offset: 0,
+    top_offset: 0
+  };
   var $window = $(window);
 
-  var $prior_appeared;
+  var $prior_appeared = {};
+  var selector_settings = {};
 
   function process() {
     check_lock = false;
-    for (var index = 0; index < selectors.length; index++) {
-      var $appeared = $(selectors[index]).filter(function() {
-        return $(this).is(':appeared');
+    var s;
+    for (var index = 0, l = selectors.length; index < l; index++) {
+      s = selectors[index];
+      var $appeared = $(s).filter(function() {
+        var $t = $(this);
+        return $t.is(':visible') && is_appeared($t, selector_settings[s].top_offset, selector_settings[s].left_offset);
       });
 
       $appeared.trigger('appear', [$appeared]);
 
-      if ($prior_appeared) {
-        var $disappeared = $prior_appeared.not($appeared);
+      if ($prior_appeared[s]) {
+        var $disappeared = $prior_appeared[s].not($appeared);
         $disappeared.trigger('disappear', [$disappeared]);
       }
-      $prior_appeared = $appeared;
+      $prior_appeared[s] = $appeared;
     }
   }
 
+  function is_appeared($element, top_offset , left_offset) {
+      var window_left = window.pageXOffset || $window.scrollLeft();
+      var window_top = window.pageYOffset || $window.scrollTop();
+      var offset = $element.offset();
+      var left = offset.left;
+      var top = offset.top;
+
+      if (top + $element.height() >= window_top &&
+          top - (top_offset || $element.data('appear-top-offset') || 0) <= window_top + $window.height() &&
+          left + $element.width() >= window_left &&
+          left - (left_offset || $element.data('appear-left-offset') || 0) <= window_left + $window.width()) {
+        return true;
+      } else if (top + $element.height() + (top_offset || $element.data('appear-top-offset') || 0) >= window_top &&
+          !(top >= window_top +  (top_offset || $element.data('appear-top-offset') || 0) ) &&
+          left + $element.width() >= window_left &&
+          left - (left_offset || $element.data('appear-left-offset') || 0) <= window_left + $window.width()) {
+        return true;
+      } else {
+        return false;
+      }
+  }
+
   // "appeared" custom filter
   $.expr[':']['appeared'] = function(element) {
     var $element = $(element);
     if (!$element.is(':visible')) {
       return false;
     }
-
-    var window_left = $window.scrollLeft();
-    var window_top = $window.scrollTop();
-    var offset = $element.offset();
-    var left = offset.left;
-    var top = offset.top;
-
-    if (top + $element.height() >= window_top &&
-        top - ($element.data('appear-top-offset') || 0) <= window_top + $window.height() &&
-        left + $element.width() >= window_left &&
-        left - ($element.data('appear-left-offset') || 0) <= window_left + $window.width()) {
-      return true;
-    } else {
-      return false;
-    }
+    return is_appeared($element);
   }
 
   $.fn.extend({
@@ -66,6 +80,7 @@
     appear: function(options) {
       var opts = $.extend({}, defaults, options || {});
       var selector = this.selector || this;
+      selector_settings[selector] = opts;
       if (!check_binded) {
         var on_check = function() {
           if (check_lock) {
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..d8587d7
--- /dev/null
+++ b/package.json
@@ -0,0 +1,24 @@
+{
+  "name": "jquery-appear-original",
+  "title": "jQuery Appear/Disappear",
+  "description": "It implements a custom 'appear'/'disappear' events which are fired when an element became visible/invisible in the browser view port.",
+  "keywords": [
+    "event",
+    "appear",
+    "disappear"
+  ],
+  "version": "0.3.3",
+  "main": "index.js",
+  "licenses": [
+    {
+      "type": "MIT",
+      "url": "http://opensource.org/licenses/MIT"
+    }
+  ],
+  "homepage": "https://github.com/morr/jquery.appear",
+  "demo": "http://morr.github.com/appear.html",
+  "issues": "https://github.com/morr/jquery.appear/issues",
+  "peerDependencies": {
+    "jquery": ">=1.7"
+  }
+}