How to insert value of web app users latitude and longitude in sqlite database?

I've received location of web app user with following code, now how can I pass this JavaScript function. Now I want to record it in sqlite database. How can I do that?

function getLocation() {
    if (navigator.geolocation) {
        navigator.geolocation.watchPosition(showPosition);
    } else { 
        x.innerHTML = "Geolocation is not supported by this browser.";}
    }