function openPopUp(pagina) {

  finestra = window.open(pagina,'','toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,resizable=yes,width=800,height=500');

  finestra.moveTo(((screen.width-800)/2),((screen.height-500)/2));

  finestra.focus();

}

function sel_changed(ob)
{
	var x = ob.selectedIndex;
	var v = ob.options[x].value;
	if (v == '-@-') { return; }
	v = v.split('@');
	window.location.href = '/userfiles/support/'+v[1];
}