js获取地理位置
navigator.geolocation.getCurrentPosition(successCallback, errorCallback, options);
演示
<!DOCTYPE html><html><head><meta name = "viewport" content = "width = device-width"/><title>Local Twitter Search</title><script type="text/javascript"> function startSearch(){ var gps = navigator.geolocation; if (gps){ gps.getCurrentPosition(searchTwitter, function(error){ alert("Got an error, code: " + error.code + " message: " + error.message); }); } else { searchTwitter(); } } function searchTwitter(position){ var query = "http://search.twitter.com/search.json?callback=showResults&q="; query += $("kwBox").value; if (position){ var lat = position.coords.latitude; var long = position.coords.longitude; query += "&geocode=" + escape(lat + "," + long + ",50mi"); } var script = document.createElement("script"); script.src = query; document.getElementsByTagName("head")[0].appendChild(script); }</script></head><body> <div id="main"> <label for="kwBox">Search Twitter:</label> <input type="text" id="kwBox"/> <input type="button" value="Go!" onclick="startSearch()"/> </div> <div id="results"> </div></body></html>
