百度api根据文字地址换取坐标点

<script type="text/javascript">
                            // 百度地图API功能
                            var map = new BMap.Map("l-map");
                            map.centerAndZoom(new BMap.Point(117.269945,31.86713), 13);
                            map.enableScrollWheelZoom(true);
                            var myGeo = new BMap.Geocoder();
                            function bdGEO(){
                                var add=$('#address').val();
                                //alert(add);
                                geocodeSearch(add);
                            }
                            function geocodeSearch(add){
                                myGeo.getPoint(add, function(point){
                                    if (point) {
                                        document.getElementById("coordinate").value=point.lng + "," + point.lat;
                                    }else{
                                        alert('生成坐标失败，请复制此链接地址获取坐标点：http://api.map.baidu.com/lbsapi/getpoint/index.html');return false;
                                    }
                                }, "全国");
                            }
                        </script>