使用百度地图API自动获取地址和经纬度

先上效果图，这是直接点击获取经纬度和地址的。没有做搜索的功能。
代码：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

<head>
    <title>点击地图获取地址和经纬度map，address，lng，lat</title>
    <meta name="robots" content="noindex, nofollow">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <!-- 将百度地图API引入，设置好自己的key -->
    <script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=您的key值"></script>
</head>

<body>

    <div class="main-div">
        <form method="post" action="" name="theForm" enctype="multipart/form-data" onsubmit="return validate()">
            <table cellspacing="1" cellpadding="3" width="100%">
                <tr>
                    <td class="label">经度</td>
                    <td><input type="text" name="lng" id="lng" value="" />
                    </td>
                </tr>
                <tr>
                    <td class="label">纬度</td>
                    <td><input type="text" name="lat" id="lat" value="" />
                    </td>
                </tr>
                <tr>
                    <td class="label">地址</td>
                    <td>
                        <input type='text' value='' name='sever_add' id='sever_add'>
                        <input type='button' value='点击显示地图获取地址经纬度' id='open'>
                    </td>
                </tr>
            </table>
        </form>
        <div id='allmap' style=' 50%; height: 50%; position: absolute; display: none'></div>
    </div>
</body>

<script type="text/javascript">
    function validate() {
        var sever_add = document.getElementsByName('sever_add')[0].value;
        if (isNull(sever_add)) {
            alert('请选择地址');
            return false;
        }
        return true;
    }

    //判断是否是空  
    function isNull(a) {
        return (a == '' || typeof(a) == 'undefined' || a == null) ? true : false;
    }

    document.getElementById('open').onclick = function() {
        if (document.getElementById('allmap').style.display == 'none') {
            document.getElementById('allmap').style.display = 'block';
        } else {
            document.getElementById('allmap').style.display = 'none';
        }
    }

    var map = new BMap.Map("allmap");
    var geoc = new BMap.Geocoder(); //地址解析对象  
    var markersArray = [];
    var geolocation = new BMap.Geolocation();


    var point = new BMap.Point(113.271431, 23.135336);
    map.centerAndZoom(point, 12); // 中心点
    geolocation.getCurrentPosition(function(r) {
        if (this.getStatus() == BMAP_STATUS_SUCCESS) {
            var mk = new BMap.Marker(r.point);
            map.addOverlay(mk);
            map.panTo(r.point);
            map.enableScrollWheelZoom(true);
        } else {
            alert('failed' + this.getStatus());
        }
    }, {
        enableHighAccuracy: true
    })
    map.addEventListener("click", showInfo);


    //清除标识  
    function clearOverlays() {
        if (markersArray) {
            for (i in markersArray) {
                map.removeOverlay(markersArray[i])
            }
        }
    }
    //地图上标注  
    function addMarker(point) {
        var marker = new BMap.Marker(point);
        markersArray.push(marker);
        clearOverlays();
        map.addOverlay(marker);
    }
    //点击地图时间处理  
    function showInfo(e) {
        document.getElementById('lng').value = e.point.lng;
        document.getElementById('lat').value = e.point.lat;
        geoc.getLocation(e.point, function(rs) {
            var addComp = rs.addressComponents;
            var address = addComp.province + addComp.city + addComp.district + addComp.street + addComp.streetNumber;
            document.getElementById('sever_add').value = address;
        });
        addMarker(e.point);
    }
</script>

</html>
就这样就完成。直接拷贝可用。
PS：转载请注明来源。