diff -r d7d56ea2d0a6 -r eadb7290c325 src/widgets/Slideshare.js
--- a/src/widgets/Slideshare.js	Fri Sep 21 11:18:57 2012 +0900
+++ b/src/widgets/Slideshare.js	Mon Sep 24 18:32:22 2012 +0200
@@ -2,12 +2,6 @@
 
 IriSP.Widgets.Slideshare = function(player, config) {
     IriSP.Widgets.Widget.call(this, player, config);
-    this.lastSlide = {
-        presentation: "",
-        slide: 0
-    }
-    this.embedObject = null;
-    this.oembedCache = {}
 }
 
 IriSP.Widgets.Slideshare.prototype = new IriSP.Widgets.Widget();
@@ -32,99 +26,94 @@
     '<div class="Ldt-SlideShare"><h2>{{l10n.slides_}}</h2><hr /><div class="Ldt-SlideShare-Container"></div></div>';
 
 IriSP.Widgets.Slideshare.prototype.draw = function() {
-    var _hide = false;
-    if (typeof this.annotation_type !== "undefined" && this.annotation_type) {
-        var _annType = this.source.getAnnotationTypes().searchByTitle(this.annotation_type);
-        _hide = !_annType.length;
+    
+    var _embedObject = null,
+        $container,
+        _lastEmbedded = "",
+        _this = this;
+    
+    function insertSlideshare(_presentation, _slide) {
+        if (_lastEmbedded === _presentation) {
+            if (_.embedObject && typeof _embedObject.jumpTo === "function") {
+                _embedObject.jumpTo(parseInt(_slide));
+            }
+        } else {
+            _lastEmbedded = _presentation;
+            var _id = IriSP.Model.getUID(),
+                _params = {
+                    allowScriptAccess: "always"
+                }
+                _atts = {
+                    id: _id
+                },
+                _flashvars = {
+                    doc : _presentation,
+                    startSlide : _slide
+                };
+            $container.html('<div id="' + _id + '"></div>');
+            swfobject.embedSWF(
+                "http://static.slidesharecdn.com/swf/ssplayer2.swf",
+                _id,
+                _this.embed_width,
+                _this.embed_height,
+                "8",
+                null,
+                _flashvars,
+                _params,
+                _atts
+            );
+            _embedObject = document.getElementById(_id);
+        }
+        $container.show();
     }
-    if (_hide) {
+    
+    var _annotations = this.getWidgetAnnotations();
+    if (!_annotations.length) {
         this.$.hide();
     } else {
         this.renderTemplate();
-        this.$container = this.$.find(".Ldt-SlideShare-Container");
-        this.onMediaEvent("timeupdate","onTimeupdate");
-        this.onTimeupdate(0);
+        var _lastPres = "",
+            _embedObject = null,
+            _oembedCache = {},
+            _this = this;
+        $container = this.$.find(".Ldt-SlideShare-Container");
+        _annotations.forEach(function(_a) {
+            _a.on("leave", function() {
+                $container.hide();
+                _lastPres = "";
+            });
+            _a.on("enter", function() {
+                var _description = _a.description,
+                    _isurl = /^https?:\/\//.test(_description),
+                    _presentation = _description.replace(/#.*$/,''),
+                    _slidematch = _description.match(/(#|\?|&)id=(\d+)/),
+                    _slide = parseInt(_slidematch && _slidematch.length > 2 ? _slidematch[2] : 1);
+                if (_presentation !== _lastPres) {
+                    if (_isurl) {
+                        if (typeof _oembedCache[_presentation] === "undefined") {
+                            var _ajaxUrl = "http://www.slideshare.net/api/oembed/1?url="
+                                + encodeURIComponent(_presentation)
+                                + "&format=jsonp&callback=?";
+                            IriSP.jQuery.getJSON(_ajaxUrl, function(_oembedData) {
+                                var _presmatch = _oembedData.html.match(/doc=([a-z0-9\-_%]+)/i);
+                                if (_presmatch && _presmatch.length > 1) {
+                                    _oembedCache[_presentation] =  _presmatch[1];
+                                    insertSlideshare(_presmatch[1], _slide);
+                                }
+                            });
+                        } else {
+                            insertSlideshare(_oembedCache[_presentation], _slide);
+                        }
+                    } else {
+                        insertSlideshare(_presentation, _slide);
+                    }
+                }
+                if (_this.sync && _embedObject && typeof _embedObject.jumpTo === "function") {
+                    _embedObject.jumpTo(parseInt(_slide));
+                }
+                _lastPres = _presentation;
+                
+            })
+        })
     }
 }
-
-IriSP.Widgets.Slideshare.prototype.onTimeupdate = function(_time) {
-    var _list = this.getWidgetAnnotationsAtTime();
-    if (_list.length) {
-        var _description = _list[0].description,
-            _isurl = /^https?:\/\//.test(_description),
-            _presentation = _description.replace(/#.*$/,''),
-            _slidematch = _description.match(/(#|\?|&)id=(\d+)/),
-            _slide = parseInt(_slidematch && _slidematch.length > 2 ? _slidematch[2] : 1),
-            _this = this;
-        if (_presentation !== this.lastSlide.presentation) {
-            if (_isurl) {
-                if (typeof this.oembedCache[_presentation] === "undefined") {
-                    var _ajaxUrl = "http://www.slideshare.net/api/oembed/1?url="
-                        + encodeURIComponent(_presentation)
-                        + "&format=jsonp&callback=?";
-                    IriSP.jQuery.getJSON(_ajaxUrl, function(_oembedData) {
-                        var _presmatch = _oembedData.html.match(/doc=([a-z0-9\-_%]+)/i);
-                        if (_presmatch && _presmatch.length > 1) {
-                            _this.oembedCache[_presentation] =  _presmatch[1];
-                            _this.insertSlideshare(_presmatch[1], _slide);
-                        }
-                    });
-                } else {
-                    this.insertSlideshare(this.oembedCache[_presentation], _slide);
-                }
-            } else {
-                this.insertSlideshare(_presentation, _slide);
-            }
-        }
-        if (_slide != this.lastSlide.slide && this.sync && this.embedObject && typeof this.embedObject.jumpTo === "function") {
-            this.embedObject.jumpTo(parseInt(_slide));
-        }
-        this.lastSlide = {
-            presentation: _presentation,
-            slide: _slide
-        }
-    } else {
-        if (this.lastSlide.presentation) {
-            this.$container.hide();
-            this.lastSlide = {
-                presentation: "",
-                slide: 0
-            }
-        }
-    }
-}
-
-IriSP.Widgets.Slideshare.prototype.insertSlideshare = function(_presentation, _slide) {
-    if (this.lastEmbedded === _presentation) {
-        if (this.embedObject && typeof this.embedObject.jumpTo === "function") {
-            this.embedObject.jumpTo(parseInt(_slide));
-        }
-    } else {
-        this.lastEmbedded = _presentation;
-        var _id = IriSP.Model.getUID(),
-            _params = {
-                allowScriptAccess: "always"
-            }
-            _atts = {
-                id: _id
-            },
-            _flashvars = {
-                doc : _presentation,
-                startSlide : _slide
-            };
-        this.$container.html('<div id="' + _id + '"></div>');
-        swfobject.embedSWF(
-            "http://static.slidesharecdn.com/swf/ssplayer2.swf",
-            _id,
-            this.embed_width,
-            this.embed_height,
-            "8",
-            null,
-            _flashvars,
-            _params,
-            _atts
-        );
-        this.embedObject = document.getElementById(_id);
-    }
-    this.$container.show();
-}