javascript - Drag and drop function matching images -

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i made dropspot drag , drop function in div has image + dropspot unfortunately function doesnt work :( wrong ?

http://jsfiddle.net/6tsfh/

$(function() {     $( ".right img" ).draggable     ({      revert: "invalid",     helper: 'clone'      });     $( "#dropspot0" ).droppable({        tolerance: 'fit',        drop: function( event, ui ) {          $(ui.draggable).clone().appendto($("#dropspot0"));       }     });   });

check jsfiddle

i think jqueryui library not included in jsfiddle.

$(function() {   $( ".right img" ).draggable   ({    revert: "invalid",   helper: 'clone'    });   $( "#dropspot0" ).droppable({      tolerance: 'intersect',       drop: function( event, ui ) {      $(ui.draggable).clone().appendto($("#dropspot0"));   }   }); });

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