for(var i = 0 ; i < _ids.length; i++){
                    console.log($.inArray(username, unconfirmed[i]))
                    if($.inArray(username, related_qa[i]) !== -1 && state[i] == '待测试')
                      tr = new Array(
                        '',
                        ''+submit_time[i]+'',
                        ''+submiter[i]+'',
                        ''+submit_content[i]+'',
                        ''+option_needed[i]+'',
                        ''+related_designer[i]+'',
                        ''+related_coder[i]+'',
                        ''+related_ui[i]+'',
                        ''+related_qa[i]+'',
                        ''+unconfirmed[i]+'',
                        ''+redmine[i]+'',
                        ''+modify_record[i]+'',
                        ''+state[i]+'',
                        '认领

'
                        +'编辑

'
                        +'删除'
                      )

                    data_table.fnAddData(tr);
                }

通过以上方法将数据填成表格的行，在 $(document).ready()获取不到表格中的元素，等页面全部加载完成才能获取到元素，如何在页面加载完成之前对元素进行操作呢？