js子窗口操作父窗口的标签

<input id="aaaa" type="button"/>
function upfile()
{

resultValue = window.showModelessDialog("ceshi.aspx?file=DownFile", window, "dialogWidth=700px;dialogHeight=70px");
}

window.dialogArguments.document.form1.aaaa.value="asdad";

window.dialogArguments.document.getElementById("coursefile").innerText="asdad";