<script>

function showModal() {

    document.form.fromModal.value =

        showModalDialog("modal-dialog.html",

            document.form.toModal.value,

            "dialogHeight:280px,dialogWidth:400px");

}

</script>

<form name="form">

<p>Type text here to be sent to the modal window and press the button:

<input name="toModal" value="from main window">

<input type="button" value="Show Modal" onClick="showModal()"></p>

<hy>

<p>Text will appear here from the modal window: <input name="fromModal">

</form>