<script type="text/javascript">
var map=new BMap.Map("c");
var point=new BMap.Point(116.404,39.915);
map.centerAndZoom(point,11);
var et=new BMap.Marker(point);
map.addOverlay(et);
et.enableDragging(true);et.addEventListener("dragend",function(){ var etpoint=et.getPoint();
document.getElementById("info").innerHTML=etpoint.lng+","+etpoint.lat;
});</script> 我想在ASP.NET的后台获取到etpoint.lng etpoint.lat这2个的值 或者直接获取到etpoint的值 需要怎么做?  谢谢