layer中获取iFrame中的数据

layer.open({  type: 2,  title: '编辑音乐',  shadeClose: false,  shade: 0.8,  btnAlign: 'c',  area: ['480px', '315px'], btn:['保存修改','取消修改'], yes:function(index,layero){var form = $(layero).find("iframe")[0].contentWindow.document.getElementById("editForm") }, btn2:function(index,layero){  },  content: [getActionUrlPrefix()+"toEditWin?model.mlId="+mlId, 'no']});