Code
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1251">
<title>Popup Form Window</title>
<script type="text/javascript">
<!--
function formWind()
{
var newWind = window.open("", "newwin", "width=500, height=500, top=50, left=50, status=no, location=no, toolbar=no, menubar=no");
newWind.document.write("<html><head>");
newWind.document.write("<title>FormWindow</title>");
newWind.document.write("</head>");
newWind.document.write("<body style=\"text-align:center;\">");
newWind.document.write("<form name=\"\" action=\"\" method=\"post\">");
newWind.document.write("<input type=\"text\" size=\"20\" name=\"\">");
newWind.document.write("<input type=\"submit\" value=\"Send\" name=\"\">");
newWind.document.write("</body></html>");
}
//-->
</script>
</head>
<body>
<input type="button" value="Открыть новое окно с формой" onclick="formWind()">
</body>
