javascript dialog box is not appearing on button click using js,ajax,php -


hi have dialog box should open on button click , display message 'it works' inside dialog box. dont know why after button click dialog box not appearing.thank you.

here js code:

function getaddwidget()     {         $.ajax({         type: "post",         url: "ajax/dashboard.php",         datatype : 'json',         cache: false,         data: {'aktion' : 'add-new-widget'},         success: function(data){             $('#addwidget').html(data.html);          },         error: function(data){             alert('error');             //$('#news').html(data.html);         }       });   }         $(function() {     $( "#dialog" ).dialog({       autoopen: false,       show: {         effect: "blind",         duration: 1000       },       hide: {         effect: "explode",         duration: 1000       }     });      $('#addwidget .butt-rahmen').live('click', function(){             if($(this).attr('id') == 'addwidgetid')         $( "#dialog" ).dialog( "open" );       getaddwidget();     });   });

dashboard.php

if($param['aktion'] == 'add-new-widget') {            $html = '<table width="538" cellspacing="0" cellpadding="0" border="0">             <tr>                 <td id="addwidget">                    <div id="dialog">                             <p>it works!!!</p>                     </div>                               </td>         </tr>     </table>';      $return = array(             'status' => 1,             'html'  => $html         );      echo json_encode($return);     die(); }


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