Мб так:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Без имени</title>
<meta http-equiv="content-type" content="text/html;charset=utf-8" />
<meta name="generator" content="Geany 0.17" />
</head>
<style type="text/css"></style>
<script type="text/javascript">
<!--
function _submit() {
window.open('','new_win','width=400,height=200,location=no,toolbar=no,menubar=no,status=no,scrollbars=yes,resizable=yes');
}
//-->
</script>
<body>
<form action="" onsubmit="_submit()" target="new_win"><input type="submit" /></form>
</body>
</html>