jq关闭子窗口并获取返回值

function openwin() {

var empyno = $("#hdempyno").val();

x = window.showModalDialog("AddPoList.aspx?id=" + empyno, window, 'dialogHeight:550px;dialogWidth:450px;center:1;help:0;status:0;');

if (x != null) {

setUserID(x.pono);

}

else {

//alert("您尚未选择人员，请选择后点击关闭按钮！");

}

}

function setUserID(x) {

document.getElementById('txtproject').innerText = x;

}

function btnpono() {

var pono = $(':radio[name="radiogroup1"]:checked').val();

var obj = window.dialogArguments;

obj.pono = pono;

window.returnValue = obj;

window.opener = null;

window.open('','_self','');

window.close();

}