function showHideMap(tornei_sectionid)
{
    var mostra_mappa_tornei = null;
    
    if ( document.getElementById('div_mappa_tornei').style.display == 'none' )
    {
        document.getElementById('div_mappa_tornei').style.display = '';
        document.getElementById('label_aprichiudimappa').innerHTML = "▲";
        var mostra_mappa_tornei = 1;
    }
    else
    {
        document.getElementById('div_mappa_tornei').style.display = 'none';
        document.getElementById('label_aprichiudimappa').innerHTML = "▼";
        var mostra_mappa_tornei = 0;
    }
    
    var ajax_preview_agt       = navigator.userAgent.toLowerCase();
    var ajax_preview_is_navMoz = (ajax_preview_agt.indexOf('mozilla')!=-1);
    var ajax_preview_is_navIE  = (ajax_preview_agt.indexOf('msie')!=-1);

    var xmlhttp;
    var return_value = "";

    if(ajax_preview_is_navIE == true)
    {
        xmlhttp = new ActiveXObject("MSXML2.XMLHTTP.3.0");
    }
    else
    {
        xmlhttp = new XMLHttpRequest();
    }

    xmlhttp.onreadystatechange = function()
    {
        if (xmlhttp.readyState==4)
        {
            var return_value = xmlhttp.responseText;
            xmlhttp.abort();
            
            //document.getElementById('div_mappa_tornei').innerHTML = return_value;
        }

    }

    xmlhttp.open("GET", "/cms/view/home/tornei/s"+tornei_sectionid+"?mostra_mappa_tornei="+mostra_mappa_tornei, true);
    xmlhttp.send(null);
}