function EmsEditControl(map,offset) {
    this.defaultAnchor = BMAP_ANCHOR_TOP_RIGHT;
    this.defaultOffset = offset;
    //TODO LIST：判断是否支持百度Map控件
    this.map = map;
}
EmsEditControl.prototype = new BMap.Control();
EmsEditControl.prototype.initialize = function(map) {
    //创建一个dom对象
     var div = document.createElement("div");
     var p = document.createElement('p');//创建一个p标签
    var imgContent ='<input type="text" id="queryLocation" placeholder="查找"><div id="searchResultPanel" style="border:1px solid #C0C0C0;width:150px;height:auto; display:none;"></div>';

     p.innerHTML = imgContent;//
     div.appendChild(p);//添加p到div中

    var ac = new BMap.Autocomplete(    //建立一个自动完成的对象
        {"input" : "queryLocation"
            ,"location" : map
        });

    ac.addEventListener("onhighlight", function(e) {  //鼠标放在下拉列表上的事件
        var str = "";
        var _value = e.fromitem.value;
        var value = "";
        if (e.fromitem.index > -1) {
            value = _value.province +  _value.city +  _value.district +  _value.street +  _value.business;
        }
        str = "FromItem<br />index = " + e.fromitem.index + "<br />value = " + value;

        value = "";
        if (e.toitem.index > -1) {
            _value = e.toitem.value;
            value = _value.province +  _value.city +  _value.district +  _value.street +  _value.business;
        }
        str += "<br />ToItem<br />index = " + e.toitem.index + "<br />value = " + value;
        $("#searchResultPanel").innerHTML = str;
    });

    var myValue;
    ac.addEventListener("onconfirm", function(e) {    //鼠标点击下拉列表后的事件
        var _value = e.item.value;
        myValue = _value.province +  _value.city +  _value.district +  _value.street +  _value.business;
        $("#searchResultPanel").innerHTML ="onconfirm<br />index = " + e.item.index + "<br />myValue = " + myValue;

        setPlace();
    });

    function setPlace(){
        map.clearOverlays();    //清除地图上所有覆盖物
        function myFun(){
            var pp = local.getResults().getPoi(0).point;    //获取第一个智能搜索的结果
            map.centerAndZoom(pp, 18);
            map.addOverlay(new BMap.Marker(pp));    //添加标注
        }
        var local = new BMap.LocalSearch(map, { //智能搜索
            onSearchComplete: myFun
        });
        local.search(myValue);
    }

    this.map.getContainer().appendChild(div);
    return div;
};