js函数返回值的问题，新手求解答

[阿玉婷子]

//路径显示
function line()
{
var geolocation = new BMap.Geolocation();
geolocation.getCurrentPosition(function (r) {
var mk = new BMap.Marker(r.point);
map.addOverlay(mk);
map.panTo(r.point);
a = r.point.lng;
b = r.point.lat;
});

var localSearch = new BMap.LocalSearch(map);
localSearch.enableAutoViewport(); //允许自动调节窗体大小
var keyword = document.getElementById("result_").value;
localSearch.setSearchCompleteCallback(function (searchResult) {
var poi = searchResult.getPoi(0);
var c = poi.point.lng;
var d = poi.point.lat;
});

var p1 = new BMap.Point(a,b);
var p2 = new BMap.Point(c,d);
var driving = new BMap.DrivingRoute(map, { renderOptions: { map: map, autoViewport: true } });
driving.search(p1, p2);
}

怎么将a,b,c,d分别传给P1,P2？？用return多数传递好像不行

[讨厌走开啦]

function line()
    {
        var geolocation = new BMap.Geolocation(), p1 = null, p2 = null;
        geolocation.getCurrentPosition(function (r) {
            var mk = new BMap.Marker(r.point);
            map.addOverlay(mk);
            map.panTo(r.point);
            a = r.point.lng;
            b = r.point.lat;
            p1 = new BMap.Point(a,b);
            if (p2 !== null) {
                var driving = new BMap.DrivingRoute(map, { renderOptions: { map: map, autoViewport: true } });
                driving.search(p1, p2);
            }
        });

        var localSearch = new BMap.LocalSearch(map);
        localSearch.enableAutoViewport(); //允许自动调节窗体大小
        var keyword = document.getElementById("result_").value;
        localSearch.setSearchCompleteCallback(function (searchResult) {
            var poi = searchResult.getPoi(0);
            var c = poi.point.lng;
            var d = poi.point.lat;
            p2 = new BMap.Point(c,d);
            if (p1 !== null) {
                var driving = new BMap.DrivingRoute(map, { renderOptions: { map: map, autoViewport: true } });
                driving.search(p1, p2);
            }
        });
    }

[JoeBlackzqq]

引用 1 楼 lqlqlq007 的回复:

function line()
    {
        var geolocation = new BMap.Geolocation(), p1 = null, p2 = null;
        geolocation.getCurrentPosition(function (r) {
            var mk = new BMap.Marker(r.point);
            map.addOverlay(mk);
            map.panTo(r.point);
            a = r.point.lng;
            b = r.point.lat;
            p1 = new BMap.Point(a,b);
            if (p2 !== null) {
                var driving = new BMap.DrivingRoute(map, { renderOptions: { map: map, autoViewport: true } });
                driving.search(p1, p2);
            }
        });

        var localSearch = new BMap.LocalSearch(map);
        localSearch.enableAutoViewport(); //允许自动调节窗体大小
        var keyword = document.getElementById("result_").value;
        localSearch.setSearchCompleteCallback(function (searchResult) {
            var poi = searchResult.getPoi(0);
            var c = poi.point.lng;
            var d = poi.point.lat;
            p2 = new BMap.Point(c,d);
            if (p1 !== null) {
                var driving = new BMap.DrivingRoute(map, { renderOptions: { map: map, autoViewport: true } });
                driving.search(p1, p2);
            }
        });
    }

没看懂!