HTML5实现地理定位

var x=document.getElementById("demo");
function getLocation()
  {
  if (navigator.geolocation)
    {
    navigator.geolocation.getCurrentPosition(showPosition);
    }
  else{x.innerHTML="您的浏览器不支持!";}
  }
function showPosition(position)
  {
  x.innerHTML="纬度: " + position.coords.latitude + 
  "<br />经度: " + position.coords.longitude;	
  }