地理定位Geolocation API•       getCurrentPosition()函数简介•       getCurrentPosition(successCallback,errorCallback,positionOptions)function getLocation()  {  if (navigator.geolocation)    {    navigator.geolocation.getCurrentPosition(showPosition);    }  else{x.innerHTML=请升级浏览器.";}  }function showPosition(position)  {  x.innerHTML="Latitude: " + position.coords.latitude +  "
Longitude: " + position.coords.longitude; }