main.html
<HTML>
<HEAD>
<TITLE> Main </TITLE>
<Script>
<!--
function fncOpenWindow()
{
window.open('./popup.html');
}
//-->
</Script>
</HEAD>
<BODY>
<form name='form'>
<input type='text' name='mainvalue'>
<input type='button' value='PopUp' onclick='javascript:fncOpenWindow();'>
</form>
</BODY>
</HTML>
popup.html
<HTML>
<HEAD>
<TITLE> Popup </TITLE>
<Script>
<!--
function fncSetvalue()
{
opener.form.mainvalue.value = document.form.popupvalue.value;
}
function fncSetValue()
{
document.form.popupvalue.value = opener.form.mainvalue.value;
}
//-->
</Script>
</HEAD>
<BODY onload='javascript:fncSetValue();'>
<form name='form'>
<input type='text' name='popupvalue'>
<input type='button' value='SetValue' onclick='javascript:fncSetvalue();'>
</form>
</BODY>
</HTML>
출처 : http://kin.naver.com/db/detail.php?d1id=1&dir_id=10105&eid=hjt81Fj8Nurk1JlSZNoMILXx6y0cmx0u&qb=cG9wdXAgus648CDDoiCwqiDA/LTeIGlucHV0IHRleHQ=
