moZes,
<html>
<head>
<title>Главное окно</title>
<script>
function openWindow() {
window.open("14.html", "new", "toolbar=no, status=no");
}
</script>
</head>
<body>
<input type="button" onclick="openWindow()" value="Показать диалог"><br>
<input type="text" id="data">
</body>
</html>
<html>
<head>
<title>Диалоговое</title>
<script>
function transferData() {
opener.document.getElementById("data").value = document.getElementById("inp").value;
window.close();
}
</script>
</head>
<body>
<input type="text" id="inp" name="inp">
<input type="button" value="OK" onclick="transferData()">
</body>
</html>
