HTML5地理定位watchPosition只调用一次

$(document).ready(function(){  
    initLOCATIOnProcedure();
}

function initLOCATIOnProcedure() {
    map = new google.maps.Map(document.getElementById('map_canvas'),{
          zoom : 17
    });

    if (navigator.geoLOCATIOn) {
        navigator.geoLOCATIOn.getCurrentPosition(displayAndWatch,locError,{
            enableHighAccuracy : true,timeout : 60000,maximumAge : 0
        });
    } else {
        alert("Your phone does not support the GeoLOCATIOn API");
    }
}

function displayAndWatch(position) {
    // set current position
    setUserLOCATIOn(position);
    // watch position
    watchCurrentPosition();
}

function setUserLOCATIOn(pos) {
    // marker for userLOCATIOn
    userLOCATIOn = new google.maps.Marker({
           map : map,position : new google.maps.LatLng(pos.coords.latitude,pos.coords.longitudE),title : "You are here",icon : "../img/user-LOCATIOn.svg",// scroll to userLOCATIOn
    map.panTo(new google.maps.LatLng(pos.coords.latitude,pos.coords.longitudE));
});

这是你在寻找的

function watchCurrentPosition() {
    var positionTimer = navigator.geoLOCATIOn.watchPosition(function(position) {
        setMarkerPosition(userLOCATIOn,position);
        map.panTo(new google.maps.LatLng(position.coords.latitude,position.coords.longitudE));
    });
}

function setMarkerPosition(marker,position) {
     marker.setPosition(new google.maps.LatLng(position.coords.latitude,position.coords.longitudE));
     console.log(position);
}

小提琴
http://jsfiddle.net/XEFks/