// ==/UserScript==

var logo = document.createElement("div");

logo.innerHTML = '<div>' +

'<script type="text/javascript">function checkcat(cn) {' +

'alert("Значение: " + cn);}</script>' +

'<form>' +

'<input type=checkbox id=pl_ua name=ua value=9 onclick=checkcat(this.value)><label for=pl_ua>Страна</label>' +

'</form>' +

'</div>';

document.body.insertBefore(logo, document.body.firstChild);