codice:
<%@ Language=VBScript %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
	<HEAD>
		<title>a</title>
		<meta name="GENERATOR" content="Microsoft Visual Studio .NET 7.1">
		<meta name="CODE_LANGUAGE" content="Visual Basic .NET 7.1">
		<meta name="vs_defaultClientScript" content="JavaScript">
		<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
		<script id="clientEventHandlersJS" language="javascript">
<!--
var w = null;
function button1_onclick() {
	w = window.open("b.asp", "popup", "top=50px, left=300px, width=300px, height=300px,");
}

function button2_onclick() {
	var x = window.open("", "popup", "top=50px, left=300px, width=300px, height=300px,");
	if(x.location.href == "about:blank")
	{
		x.close();
		alert("finestra chiusa");
	}
	else 
		alert("finestra già aperta");
}

function chiudipopupconnone_onclick() {
	window.open("", "popup", "top=50px, left=300px, width=300px, height=300px,").close();
}

//-->
		</script>
	</HEAD>
	<body MS_POSITIONING="FlowLayout">
		<h1>A.aspx</h1>
		


			<INPUT type="button" value="Apre B" id="button1" language="javascript" onclick="return button1_onclick()">
		</P>
		


			<INPUT type="button" value="Controlla se B è aperta" id="button2" language="javascript" onclick="return button2_onclick()">
		</p>


<INPUT id="chiudipopupconnone" type=button value="Chiudi popup con nome" LANGUAGE=javascript onclick="return chiudipopupconnone_onclick()"></P>
		
		<form id="Form1" method="post" runat="server">
			

<INPUT type="submit" value="Submit" id=submit1 name=submit1></P>
		</form>
	</body>
</HTML>