这个词我也是这个项目才听说，然后百度了个转换方法，其实对不对我也不知道，因为我压根不知道上海城市坐标从哪儿看

贴贴代码

function wgs84Tosh(lat, lon) {        var xx, yy, r2d, tolat, tolon, rearth, PI;        PI = 3.141592653589793;        r2d = 57.2957795131;        tolat = (31 + (14.0 + 7.55996 / 60.0) / 60.0) / r2d;        tolon = (121.0 + (28.0 + 1.80651 / 60.0) / 60) / r2d;        rearth = 6371006.84; var hor, frlat, frlon, gcdist, clatf, clatt, slatf, slatt, gcbrg;        var dlon, cdlon, sdlon, sdist, cdist, sbrg, cbrg, temp;        var intlat, intlon;        intlat = lat;        intlon = lon;        frlat = lat / r2d;        frlon = lon / r2d;        clatt = Math.cos(frlat);        clatf = Math.cos(tolat);        slatt = Math.sin(frlat);        slatf = Math.sin(tolat);        dlon = frlon - tolon; cdlon = Math.cos(dlon);        sdlon = Math.sin(dlon);        cdist = slatf * slatt + clatf * clatt * cdlon;        temp = (clatt * sdlon) * (clatt * sdlon) + (clatf * slatt - slatf * clatt * cdlon) * (clatf * slatt - slatf * clatt * cdlon);        sdist = Math.sqrt(Math.abs(temp));        if ((Math.abs(sdist) > 1e-7) || (Math.abs(cdist) > 1e-7))            gcdist = Math.atan2(sdist, cdist);        else            gcdist = 0;        sbrg = sdlon * clatt;        cbrg = (clatf * slatt - slatf * clatt * cdlon);        if ((Math.abs(sbrg) > 1e-7) || (Math.abs(cbrg) > 1e-7)) {            temp = Math.atan2(sbrg, cbrg);            while (temp < 0) {                temp = temp + 2 * PI;                gcbrg = temp;            }        } else            gcbrg = 0;        hor = gcdist * rearth;        xx = hor * Math.sin(temp);        yy = hor * Math.cos(temp);        return [xx, yy];    }

讲真啊  我连两个参数哪个是东京，哪个是北纬我都忘了

lat应该是北纬，lon那就是东经了

然后返回值也是第一个是北纬 ，第二个是东经。

这个项目还用了用百度地图，不过也就是打开地图，定位下而已

比如这样

　　var map;    function loadJScript() {        var script = document.createElement("script");        script.type = "text/javascript";        script.src = "http://api.map.baidu.com/api?v=2.0&ak=×××××××××××××××&callback=init";        document.body.appendChild(script);    }    function init() {        map = new BMap.Map("allmap");// 创建Map实例        //var point = new BMap.Point(121.446235, 31.169152); // 创建点坐标        map.centerAndZoom("上海", 17);        map.enableScrollWheelZoom(true);    }    window.onload = loadJScript;　　function showmap(a, b) {        map.clearOverlays();        var new_point = new BMap.Point(a, b);        var marker = new BMap.Marker(new_point);  // 创建标注        map.addOverlay(marker);              // 将标注添加到地图中        //map.panTo(new_point);        setTimeout(function () {            map.panTo(new_point);        }, 200);    }