親ウインドウのデータ参照
OPEN

<script language="JavaScript"><!--
function subopen(){
window.open("ko.html","subwin",
"width=450,height=320,toolbar=no,scrollbars=no,left=200,top=100");
}
// --></script>
<A href="javascript:subopen()">OPEN</A>
<form name="oyaform">
<input type="text"name="oyatext"value="12345">
</form>