baidutrans.js

//引入sdk
<script type="text/javascript" src="http://api.map.baidu.com/api?v=1.5&ak=92629415fca97664eb35673e5399d64a"></script>
<script type="text/javascript" src="http://developer.baidu.com/map/jsdemo/demo/convertor.js"></script>

//api取出的lon和lat
var lon = something...
var lat = something...

var toPoint =  new BMap.Point(lon,lat);

BMap.Convertor.translate(toPoint,2,function(baiduToPoint){
  //dest即为转换后的集合
  var dest = baiduToPoint.lat+','+baiduToPoint.lng;
}