// new code  
var map = null;
var props = 'width=1000,height=650,location=no,toolbar=no,menubar=no,scrollbars=yes,resizable=yes,top=10,left=10';
var url = 'http://negocios.maiadigital.pt/roteiro/?mod=pe&localiza=';
var name = 'window_map';

function openMap(id)
{   
    map = window.open("", name, props);

    if(!map || !map.document || !map.viewPoi){
        map=window.open(url+id, name, props);
        map.focus();
    } else {
        map.viewPoi(id);
        map.focus();
    }   
}   

/*var window_map;

function openMap(id)
{
    var windowprops = "width=1000,height=650,location=no,toolbar=no,menubar=no,scrollbars=yes,resizable=yes,top=10,left=10";
    window_map = window.open ('http://negocios.maiadigital.pt/roteiro/?localiza='+id+'&mod=pe', 'window_map', windowprops);
    window_map.focus();
}

function refreshMap(id)
{
    if (window_map && !window_map.closed)
        window_map = window.open ('http://negocios.maiadigital.pt/roteiro/?localiza='+id+'&mod=pe', 'window_map', windowprops);
}*/