draggables options: http://docs.jquery.com/UI/Draggables/draggable#options
$(".droppable-photos-container").droppable({
accept: ".img_content",
drop: function(ev, ui) {
ui.draggable.clone().fadeOut("fast",
function() {
$(this).fadeIn("fast")
}).appendTo($(this).empty());
}
});
<div id="droppablePhotos" style="min-height: 130px; min-height:130px; height:auto !important; zoom:1;">
<ul class="droppable-gallery">
<li class="droppable-img-content">
<img src="templates/images/P1010020.JPG" alt="Tatry 1" title="Drag me!" />
</li>
<li class="droppable-img-content">
<img src="templates/images/P1010039.JPG" alt="Tatry 3" title="Drag me!" />
</li>
<li class="droppable-img-content">
<img src="templates/images/P1010044.JPG" alt="Tatry 4" title="Drag me!" />
</li>
</ul>
<div class="droppable-photos-container" style="text-align: center;">Drop here!</div>
</div>