function showmenu(id)
	{
	if(document.getElementById('ul_'+id).style.display == 'none')
		{
		document.getElementById('ul_'+id).style.display='';
		document.getElementById('ul_'+id).style.visibility='';
		}
	else
		{
		document.getElementById('ul_'+id).style.display='none';
		document.getElementById('ul_'+id).style.visibility='hidden';
		}
	}
function write_mhref(user, domain, text)
   {
   var at = '@';
   var mail = user + at + domain;
   document.write("<a href='mailto:" + mail + "' title='Napisz do nas' class='footer_text'>" + ( text == undefined ? mail : text ) + "</a>");
   }