<html>
<head>
<title>Скрытый блок</title>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1251">
<SCRIPT LANGUAGE="JavaScript">
<!--
function ablok() {
if (document.getElementById('test').style.display='block')
{document.getElementById('test').style.display='none'}
else
{document.getElementById('test').style.display='block'}
}
//-->
</script>
</head>
<body onclick="ablok()">
<div align=center id="test" style="position:absolute; top:20; left:345; width:120; height:230">Скрытый блок</div>
</body></html>