<html>
<head>
<script language="JavaScript"> function function1() {
var m = event.nextPage;
alert("If no at-rule page was specified, the value is an empty string: \n"+'"'+m+'"');
}
</script>
</head>
<body bottommargin="150">
<input type="Button" id="myB" value="Click here" onClick="function1();">
</body>
</html>