layer页向父页传值

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父页面<!-- 弹出层组件包 --><script type="text/javascript" src="basics/plugin/layer/layer.js"></script>        <script type="text/javascript">               function getTreeInfo(){                   layer.config({                       extend: 'extend/layer.ext.js'                   });                     layer.ready(function() {                       layer.open({                           type: 2,                           skin: 'layui-layer-lan',                           title: '请选择任务接收人',                           fix: false,                           shadeClose: true,                           maxmin: true,                           area: ['420px', '320px'],                           content: 'get_tree/get_tree.jsp',                           btn: ['确定','关闭'],                           yes: function(index){                                //当点击‘确定’按钮的时候，获取弹出层返回的值                                var res = window["layui-layer-iframe" + index].callbackdata();                                if(res!=null && res!=""){                                     var toid = res.split('@')[0];                                     var towho = res.split('@')[1];                                     $("#to_id").val(toid);                                     $("#to_who").val(towho);                                } ;                                layer.close(index);                           },                           end: function () {                           }                       });                   });                }        </script>子页面<script >var callbackdata = function () {    return toId+"@"+toWho;}</script>
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