(function(){
 var ENTERKEY = 13;
 
-CartListing = function(table) {
+CartListing = function(table) {
        var thisCL = this;
        this.table = table;
        var form = table.parentNode;
-       while(form.tagName != 'FORM')
-               form = form.parentNode;
+       while(form.tagName !== 'FORM') {
+               form = form.parentNode;}
        
        this.fm = new FormManager(form);
        
-       if (browser.isIE)
-               addListener(table, 'focusout', function(evt){thisCL.updateRow(evt);});
-       else
-               addListener(table, 'change', function(evt){thisCL.updateRow(evt);});
+       if (browser.isIE){
+               addListener(table, 'focusout', function(evt){thisCL.updateRow(evt);});}
+       else{
+               addListener(table, 'change', function(evt){thisCL.updateRow(evt);});}
        
        addListener(table, 'keypress', function(evt){thisCL.onKeypress(evt);});
-}
+};
 
 CartListing.prototype.updateRow = function(evt) {
        var target = getTargetedObject(evt);
-       if (target.tagName != 'INPUT')
-               return;
+       if (target.tagName !== 'INPUT'){
+               return;}
                        
        
        var row = target.parentNode.parentNode;
-       var inputs = row.getElementsByTagName('input')
+       var inputs = row.getElementsByTagName('input');
        var refreshBtn = inputs[1];
        this.fm.submitButton = refreshBtn;
        this.fm.submit(evt);
 };
 
 CartListing.prototype.onKeypress = function(evt){
-       if (evt.keyCode == ENTERKEY)
-               this.updateRow(evt);
+       if (evt.keyCode === ENTERKEY){
+               this.updateRow(evt);}
 };
 
-})();
\ No newline at end of file
+}());
 
        req.send(null);
        hideProgressImage();
        
-       if (req.status != 200){
+       if (req.status !== 200){
                alert(req.status);
                return;
        }
        var wdgtNode = this.wdgtNode = getCopyOfNode(doc);
        slide.appendChild(wdgtNode);
        
-       var descriptions = this.descriptions = new Array();
+       var descriptions = this.descriptions = [];
        var divs = wdgtNode.getElementsByTagName('div');
-       var d;
-       for (var i=0; i<divs.length; i++) {
+       var d, i;
+       for (i=0; i<divs.length; i++) {
                d = divs[i];
-               if (d.className =='ppt-description') {
+               if (d.className === 'ppt-description') {
                        descriptions[d.getAttribute('name')] = d;
                }
        }
        fm.onBeforeSubmit  = function(fm, evt){return thisCart.onBeforeSubmit(fm, evt);};
        fm.onResponseLoad = function(req){return thisCart.loadResponse(req);};
 
-       with (descriptions[itemSelector.value].style) {
-               visibility = 'visible';
-               display='block';
-       }
+       descriptions[itemSelector.value].style.visibility = 'visible';
+       descriptions[itemSelector.value].style.display='block';
        this.selectedItem = itemSelector.value;
        
-       addListener(itemSelector, 'change', function(evt){thisCart.selectItem(evt)})
-}
+       addListener(itemSelector, 'change', function(evt){thisCart.selectItem(evt);});
+};
 
 CartWidget.prototype.selectItem = function(evt) {
-       with(this.descriptions[this.selectedItem].style) {
-               visibility = 'hidden';
-               display = 'none'
-       }
+       this.descriptions[this.selectedItem].style.visibility = 'hidden';
+       this.descriptions[this.selectedItem].style.display = 'none';
        var name = this.itemSelector.value;
        
-       with (this.descriptions[name].style) {
-               visibility = 'visible';
-               display='block';
-       }
+       this.descriptions[name].style.visibility = 'visible';
+       this.descriptions[name].style.display='block';
+
        this.selectedItem = name;
 };
 
 CartWidget.prototype.onBeforeSubmit = function(fm, evt) {
-       if (fm.submitButton.name == 'cancel') {
+       if (fm.submitButton.name === 'cancel') {
                this.onCancel();
                return 'cancelSubmit';
        }
                        confirm.innerHTML = text;
                        slide.appendChild(confirm);
 
-                       var duration = parseInt(doc.getAttribute('duration')) * 1000;
+                       var duration = parseInt(doc.getAttribute('duration'), 10) * 1000;
                        var thisCart = this;
 
                        setTimeout(function(){
 
 CartWidget.prototype.onAfterConfirm = function(){};
 
-})();
\ No newline at end of file
+}());
\ No newline at end of file
 
     <div metal:define-macro="grid"
          tal:define="slide_size portal_object/slide_size;
                      mayBeDropable exists:dropable;
-                     dropable python:True if mayBeDropable and dropable else False"
+                     dropable python:True if mayBeDropable and dropable else False;
+                     mayBeOrderable exists:orderable;
+                     orderable python:True if mayBeOrderable and orderable else False"
          i18n:domain="portfolio">
       <div id="lightbox" tal:attributes="class python:'lightbox photo-drop-target' if dropable else 'lightbox'">
         <span metal:define-macro="thumbnails" tal:repeat="info infos" tal:omit-tag="">
                             selected info/selected|nothing"
                 tal:attributes="class info/className;
                                 name info/cmf_uid"
-                metal:define-macro="thumbnail">
+                metal:define-macro="thumbnail"
+                draggable="true">
             <a class="slide" tal:attributes="href info/href; title info/title">
               <img tal:attributes="src info/thumbUrl;
                                    alt info/title;
                 new Lightbox(lb,
                              document.getElementById('lightbox_toolbar'),
                              %(complete)s,
-                             '%(container_type)s');
+                             '%(container_type)s',
+                             %(orderable)s);
                 var uploadUrl = '%(putUrl)s';
                 var options = {'slideSize' : %(slideSize)d,
                                'thumbnailSize' : %(thumbnailSize)d};
                      'slideSize' : portal_object.slide_size,
                      'thumbnailSize' : portal_object.thumb_size,
                      'complete': 'true' if not batch.next else 'false',
-                     'container_type' : options.get('container_type', 'portfolio')}">
+                     'container_type' : options.get('container_type', 'portfolio'),
+                     'orderable' : 'true' if orderable else 'false'}">
       </script>
     </div>
     <div metal:define-macro="film_bar" tal:omit-tag="">
 
 
 var reSelected = /.*selected.*/;
 
-Lightbox = function(grid, toolbar, complete, container_type) {
+Lightbox = function(grid, toolbar, complete, container_type, orderable) {
        var self = this;
        this.grid = grid;
        this._buildSlidesIndex(); // set this.slides and this.lastSlide;
                addListener(window, 'scroll', function(evt){self.windowScrollToolbarlHandler(evt);});
        }
        addListener(window, 'scroll', function(evt){self.windowScrollGridHandler(evt);});
-       // addListener(window, 'load', function(evt){ self.windowScrollGridHandler();});
        registerStartupFunction(function(){ self.windowScrollGridHandler();});
        this.lastCBChecked = undefined;
        this.form = undefined;
                fm.onBeforeSubmit = function(fm_, evt) {return self.onBeforeSubmit(fm_, evt);};
                fm.onResponseLoad = function(req) {return self.onResponseLoad(req);};
        }
+
+       // drag and drop
+       this.disableDefaultDragging();
+       this._DDOrderingListeners = {'dragstart' : function(evt){self.onDragStart(evt);},
+                                                                'dragover' : function(evt){self.onDragOver(evt);},
+                                                                'dragend' : function(evt){self.onDragEnd(evt);}
+                                                                };
+       if(orderable) {this.enableDDOrdering();}
 };
 
 Lightbox.prototype._buildSlidesIndex = function() {
                this.switchToolBarPositioning(false);
        }
 };
+
 Lightbox.prototype.windowScrollGridHandler = function(evt) {
        if (!this.complete &&
                !this.fetchingDisabled &&
 Lightbox.prototype.onChangeHandler = function(evt) {
        var target = getTargetedObject(evt);
        if (target.name === 'sort_on') {
+               if (target.value === 'position') {this.enableDDOrdering();}
+               else {this.disableDDOrdering();}
                this.fm.submitButton = {'name' : 'set_sorting', 'value' : 'ok'};
                this.fm.submit(evt);
        }
                node = doc.childNodes[i];
                if (node.nodeType === 1) {
                        node = getCopyOfNode(node);
+                       this.disableDefaultDragging(node);
                        this.grid.replaceChild(node, this.slides[j]);
                        this.slides[j] = node;
                        j++;
                node = doc.childNodes[i];
                if (node.nodeType === 1) {
                        this.lastSlide = this.grid.appendChild(getCopyOfNode(node));
+                       this.disableDefaultDragging(this.lastSlide);
                        this.slides.push(this.lastSlide);
                        if (this.cbIndex) {
                                c = this.lastSlide.getElementsByTagName('input')[0];
        };
 }
 
+if (browser.isGecko) {
+       Lightbox.prototype.disableDefaultDragging = function(element) {
+               if (!element) {
+                       element = this.grid;
+               }
+               var i, j, name, elements;
+               var elementsNames = ['a', 'img'];
+               for (i=0 ; i < elementsNames.length ; i++) {
+                       name = elementsNames[i];
+                       elements = element.getElementsByTagName(name);
+                       for (j=0 ; j < elements.length ; j++) {
+                               elements[j].draggable=false;
+                       }
+               }
+       };
+}
+else {
+       Lightbox.prototype.disableDefaultDragging = function() {};
+}
+
+Lightbox.prototype.getSelectedSlides = function() {
+       var i, e, slide;
+       var slides = [];
+       for (i=0 ; i<this.form.elements.length ; i++) {
+               e = this.form.elements[i];
+               if (e.type === 'checkbox' && e.checked) {
+                       slide = e.parentNode.parentNode;
+                       slides.push(slide);
+               }
+       }
+       return slides;
+};
+
+
+Lightbox.prototype.enableDDOrdering = function() {
+       addListener(this.grid, 'dragstart', this._DDOrderingListeners.dragstart);
+       addListener(this.grid, 'dragover', this._DDOrderingListeners.dragover);
+       addListener(this.grid, 'dragend', this._DDOrderingListeners.dragend);
+};
+
+Lightbox.prototype.disableDDOrdering = function() {
+       removeListener(this.grid, 'dragstart', this._DDOrderingListeners.dragstart);
+       removeListener(this.grid, 'dragover', this._DDOrderingListeners.dragover);
+       removeListener(this.grid, 'dragend', this._DDOrderingListeners.dragend);
+};
+
+Lightbox.prototype.onDragStart = function(evt) {
+       var target = getTargetedObject(evt);
+       this.dragged = target;
+       this.draggedSelection = this.getSelectedSlides();
+       if (this.draggedSelection.indexOf(target) === -1) {
+               this.draggedSelection.push(target);
+       }
+       evt.dataTransfer.setData('text', '');
+       var i, slide;
+       for(i=0 ; i<this.draggedSelection.length ; i++) {
+               slide = this.draggedSelection[i];
+               slide.style.opacity = 0;
+               slide.style.width = 0;
+       }
+};
+
+Lightbox.prototype.onDragOver = function(evt) {
+       if (!this.dragged) {
+               return;
+       }
+       var target = getTargetedObject(evt);
+       while(target && target.className !== 'slide') {
+               target = target.parentNode;
+       }
+       if (!target) {return;}
+       target = target.parentNode;
+       if (target !== this.dragged) {
+               target.classList.add('dragover');
+       }
+       if (this.lastDropTarget && this.lastDropTarget !== target) {
+               this.lastDropTarget.classList.remove('dragover');
+       }
+       this.lastDropTarget = target;
+};
+
+Lightbox.prototype.onDragEnd = function(evt) {
+       if (this.lastDropTarget) {
+               this.lastDropTarget.classList.remove('dragover');
+               var i, slide;
+               this.pendingMovedSlides = [];
+               for(i=this.draggedSelection.length -1 ; i>=0 ; i--) {
+                       slide = this.draggedSelection[i].cloneNode(true);
+                       this.pendingMovedSlides.push(slide);
+                       this.grid.insertBefore(slide, this.lastDropTarget.nextSibling);
+                       slide.style.opacity = 1;
+                       slide.style.width = '';
+               }
+               this.moveSelectedPhotos();
+       }
+       // this.draggedSelection = this.lastDropTarget
+       this.dragged = undefined;
+};
+
+Lightbox.prototype.moveSelectedPhotos = function() {
+       var req = new XMLHttpRequest();
+       self = this;
+       req.onreadystatechange = function() {
+               switch (req.readyState) {
+                       case 1 :
+                               showProgressImage();
+                               break;
+                       case 4 :
+                               hideProgressImage();
+                               self._moveSelectedPhotos(req);
+                               break;
+               }
+       };
+       
+       var url = absolute_url() + '/portfolio_move_photos';
+       req.open("POST", url, true);
+       req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
+       var query = 'container_type=' + this.container_type;
+       var i;
+       for (i=0 ; i<this.draggedSelection.length ; i++) {
+               query += '&uids:list=' + this.draggedSelection[i].getAttribute('name');
+       }
+       query += '&afterUid=' + this.lastDropTarget.getAttribute('name');
+       req.send(query);
+};
+
+Lightbox.prototype._moveSelectedPhotos = function(req) {
+       var i, slide, cb;
+       if (req.status === 200) {
+               var doc = req.responseXML.documentElement;
+               if (doc.nodeName === 'ok') {
+                       for(i=0 ; i<this.draggedSelection.length ; i++) {
+                               slide = this.draggedSelection[i];
+                               this.grid.removeChild(slide);
+                               cb = this.pendingMovedSlides[i].getElementsByTagName('input')[0];
+                               cb.checked = false;
+                               cb.removeAttribute('checked');
+                       }
+                       this.pendingMovedSlides = undefined;
+                       this.cbIndex = undefined;
+                       return;
+               }
+       }
+       
+       for(i=0 ; i<this.pendingMovedSlides.length ; i++) {
+               slide = this.pendingMovedSlides[i];
+               this.grid.removeChild(slide);
+       }
+       
+       for(i=0 ; i<this.draggedSelection.length ; i++) {
+               slide = this.draggedSelection[i];
+               slide.style.opacity = 1;
+               slide.style.width = '';
+       }
+};
+
 }());
\ No newline at end of file