Javascript, getting undefined for no reason [duplicate]

This question already has an answer here:

• Why is my variable unaltered after I modify it inside of a function? - Asynchronous code reference 4 answers

Why do i always get undefined on object location1 lat and lng properties? I have been trying this now for like 2 hours, always undefined no matter what i do..

<script>
function getLocation()
{
    if (navigator.geolocation) {
        navigator.geolocation.getCurrentPosition(showPosition);
    }
}
function locations(lat,lng)
{
    this.lat = lat;
    this.lng = lng;
}
function showPosition(position)
{
    window.lat = position.coords.latitude;
    window.lng = position.coords.longitude;
}
getLocation();
var location1 = new locations(window.lat,window.lng);
</script>