diff --git a/jquery.appear.js b/jquery.appear.js
index ff0b764..cfcf2c8 100644
--- a/jquery.appear.js
+++ b/jquery.appear.js
@@ -15,8 +15,11 @@
   var check_lock = false;
   var defaults = {
     interval: 250,
-    force_process: false
-  }
+    force_process: false,
+    appear_left_offset: 0,
+    appear_top_offset: 0
+  };
+  var params = {};
   var $window = $(window);
 
   var $prior_appeared;
@@ -52,19 +55,20 @@
     var top = offset.top;
 
     if (top + $element.height() >= window_top &&
-        top - ($element.data('appear-top-offset') || 0) <= window_top + $window.height() &&
+        top - ($element.data('appear-top-offset') || params.appear_top_offset) <= window_top + $window.height() &&
         left + $element.width() >= window_left &&
-        left - ($element.data('appear-left-offset') || 0) <= window_left + $window.width()) {
+        left - ($element.data('appear-left-offset') || params.appear_left_offset) <= window_left + $window.width()) {
       return true;
     } else {
       return false;
     }
-  }
+  };
 
   $.fn.extend({
     // watching for element's appearance in browser viewport
     appear: function(options) {
       var opts = $.extend({}, defaults, options || {});
+      params = opts;
       var selector = this.selector || this;
       if (!check_binded) {
         var on_check = function() {
@@ -94,7 +98,7 @@
       if (check_binded) {
         process();
         return true;
-      };
+      }
       return false;
     }
   });