数据表格原先有三行

                      $(
                      "#rules_show").
                      datagrid({ 
                      dataSource: { 
                      cols: [
            {
                      name: 
                      "name"
                      , 
                      label: 
                      "字段名"
                      , 
                      width: 
                      0.2}
                      , 
                       {
                      name: 
                      "rules"
                      , 
                      label: 
                      "解析规则"
                      , 
                      width: 
                      0.5}
                      , 
                       {
                      name: 
                      "operation"
                      , 
                      label: 
                      "操作"
                      , 
                      width: 
                      0.3
                      , 
                      html: 
                      true}
        ]
                      , 
                       
                      array: [
            {
                      name: 
                      "Title"
                      , 
                      rules: 
                      "XXXXXX"
                      , 
                      operation: 
                      "<a href='j a v a s c r i p t :;'>修改</a> <a class='delete_btn'>删除</a>"}
                      , 
                       {
                      name: 
                      "Date"
                      , 
                      rules: 
                      "XXXXXXXXXXXXX"
                      , 
                      operation: 
                      "<a href='j a v a s c r i p t :;'>修改</a> <a class='delete_btn' href='j a v a s c r i p t :;' >删除</a>"}
                      , 
                       {
                      name: 
                      "author"
                      , 
                      rules: 
                      "XXXXXXXXXX"
                      , 
                      operation: 
                      "<a href='j a v a s c r i p t :;'>修改</a> <a class='delete_btn' href='j a v a s c r i p t :;' >删除</a>"}
        ]
    }
                      )

点击删除后删除第一行，第一二行的内容会重新渲染，但是第三行的数据依然是保留的,不会被清空

求解