$("#draw").on("click", function () {
                var tab_rys = []

                for(i=0;i<tablica.length;i++)
                {
                    if(tablica[i].lat!=undefined) tab_rys.push({ lat: parseFloat(tablica[i].lat), lng: parseFloat(tablica[i].long) })
                }
                console.log(tab_rys)
                $("#mapDiv").gmap3({
                    clear: {
                        name: ["polyline"],
                        last: true
                    },
                    polyline: { // wielokąt
                        options: {
                            strokeColor: "#0000ff",
                            strokeOpacity: 0.5,
                            strokeWeight: 4,
                            path: tab_rys,
                        },

                    }

                })

            })