datatabes edit时设置默认数值和使用函数

var  editor;  // use a global for the submit and return data rendering in the examples
 
$(document).ready( function () {
     editor =  new  $.fn.dataTable.Editor( {
         ajax:  "../php/staff.php" ,
         table:  "#example" ,
         fields: [ {
                 label:  "First name:" ,
                 name:  "first_name"
             }, {
                 label:  "Last name:" ,
                 name:  "last_name"
             }, {
                 label:  "Position:" ,
                 name:  "position" ,
                 def:  "Software developer"
             }, {
                 label:  "Office:" ,
                 name:  "office" ,
                 def:  "Edinburgh"
             }, {
                 label:  "Extension:" ,
                 name:  "extn" ,
                 def:  "0000"
             }, {
                 label:  "Start date:" ,
                 name:  "start_date" ,
                 def:  function  () {  return  new  Date(); },
                 type:  "datetime"
             }, {
                 label:  "Salary:" ,
                 name:  "salary" ,
                 def:  "85000"
             }
         ]
     } );
 
     $( '#example' ).DataTable( {
         dom:  "Bfrtip" ,
         ajax:  "../php/staff.php" ,
         columns: [
             { data:  null , render:  function  ( data, type, row ) {
                 // Combine the first and last names into a single table field
                 return  data.first_name+ ' ' +data.last_name;
             } },
             { data:  "position"  },
             { data:  "office"  },
             { data:  "extn"  },
             { data:  "start_date"  },
             { data:  "salary" , render: $.fn.dataTable.render.number(  ',' ,  '.' , 0,  '$'  ) }
         ],
         select:  true ,
         buttons: [
             { extend:  "create" , editor: editor },
             { extend:  "edit" ,   editor: editor },
             { extend:  "remove" , editor: editor }
         ]
     } );
} );