function back_write() {

 document.writeln('<table border="0" cellpadding="0" cellspacing="0" width="670"><tr><td width="670" bgcolor="#ffffff" align="center"><a href="javascript:history.back();" onMouseOut="MM_swapImgRestore();" onMouseOver="MM_swapImage(\'back\',\'\',\'http://www.coltibuono.net/img_cmn/back_o.gif\',1);"><img src="http://www.coltibuono.net/img_cmn/back.gif" width="52" height="31" vspace="11" border="0" alt="back" name="back"></a></td></tr></table>');

}

