スクリプト

<HTML>
<HEAD>
<TITLE>Sample</TITLE>
</HEAD>
<SCRIPT Language="JavaScript">
<!--
newWin = window.open("Dummy.htm","Sample","width=200,height=200");
// -->
</SCRIPT>
<BODY bgColor="white">
<FORM>
<INPUT TYPE="button" VALUE="クローズチェック" onCLick="alert(newWin.closed)">
</FORM>
</BODY></HTML>