百度地图自定义覆盖物

    <script>

    var map = new BMap.Map('allmap');

    var Bcenter = new BMap.Point(116.404,39.915);

    map.centerAndZoom(Bcenter,11);

    

    //自定义的覆盖物

    function myOverlay(point,text,mouseoverText){

        this._point = point;

        this._text = text;

        this._overtext = mouseoverText;

    }

    

    //继承overlay的API

    myOverlay.prototype = new BMap.Overlay();

     

    //初始化自定义覆盖物

    myOverlay.prototype.initialize = function(map){

        this._map = map;

        //创建div标签

        var div = this._div = document.createElement('div');

        div.style.position = 'absolute';

        div.style.zIndex = BMap.Overlay.getZIndex(this._point.lat);

        div.style.backgroundColor = '#EE5D5B';

        div.style.border = '1px solid #BC3B3A';

        div.style.color = 'white';

        div.style.height = '18px';

        div.style.padding = '2px';

        div.style.lineHeight = '18px';

        div.style.whiteSpace = 'nowrap';

        div.style.MozUserSelect = 'none';

        div.style.fontSize = '12px';

        //创建span标签

        var span = this._span = document.createElement('span');

        div.appendChild(span);

        span.appendChild(document.createTextNode(this._text));

        var that = this;

        

        //箭头的穿件

        var arrow = this._arrow = document.createElement('div');

        arrow.style.background = "url(http://map.baidu.com/fwmap/upload/r/map/fwmap/static/house/images/label.png) no-repeat";

        arrow.style.position = "absolute";

        arrow.style.width = "11px";

        arrow.style.height = "10px";

        arrow.style.top = "22px";

        arrow.style.left = "10px";

        arrow.style.overflow = "hidden";

        div.appendChild(arrow);

        //标签绑定事件

    /*div.onmouseover = function(){

            this.style.backgroundColor = "#6BADCA";

            this.style.borderColor = "#0000ff";

            this.getElementsByTagName("span")[0].innerHTML = that._overtext;

            arrow.style.backgroundPosition = "0px -20px";

        }



        div.onmouseout = function(){

            this.style.backgroundColor = "#EE5D5B";

            this.style.borderColor = "#BC3B3A";

            this.getElementsByTagName("span")[0].innerHTML = that._text;

            arrow.style.backgroundPosition = "0px 0px";

        }

        */

        //添加到覆盖物的容器中

        map.getPanes().labelPane.appendChild(div);

        return div;

    }

    

    //绘制覆盖物

    myOverlay.prototype.draw = function(){

        var map = this._map;

        var pixel = map.pointToOverlayPixel(this._point);

        this._div.style.left = pixel.x - parseInt(this._arrow.left) + 'px';

        this._div.style.top = pixel.y - 30 + 'px';

    }

    

    //覆盖物显示

    myOverlay.prototype.show = function(){

        if(this._div){

            this._div.style.display = '';

        

        }

    }

    

    //隐藏覆盖物

    myOverlay.prototype.hide = function(){

        if(this._div){

            this._div.style.display = 'none';

        }

    }

    

    //自定义覆盖物添加事件

    myOverlay.prototype.addEventListener = function (event, fun) {

        this._div['on' + event] = fun;

    

    }

    

    var myoverlay = new myOverlay(Bcenter,'鼠标上来看看','鼠标下去看看');

    map.addOverlay(myoverlay);

    myoverlay.addEventListener('click',function(){

        alert('注册点击事件');

    })

    </script>

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