how to use directive inside a function for google location - angularjs

Question

i'm trying to use google map directive in my angularjs project heres the directive:
.directive("myMaps", function(){
return{
restrict:'E', //Element Type
template:'<div></div>', //Defining myApp div
replace:true, //Allowing replacing
link: function($scope, element, attributes){
$scope.title = attributes.title;
$scope.type = attributes.type;
alert('fdfd');
alert($scope.title +'ddddddd'+$scope.type);
//Initializing Coordinates
var myLatLng = new google.maps.LatLng($scope.title,$scope.type);
var mapOptions = {
center: myLatLng, //Center of our map based on LatLong Coordinates
zoom: 5, //How much we want to initialize our zoom in the map
//Map type, you can check them in APIs documentation
mapTypeId: google.maps.MapTypeId.ROADMAP
};
//Attaching our features & options to the map
var map = new google.maps.Map(document.getElementById(attributes.id),
mapOptions);
//Putting a marker on the center
var marker = new google.maps.Marker({
position: myLatLng,
map: map,
title:"My town"
});
marker.setMap(map); //Setting the marker up
}
};
})
it works good, but how i can call it inside a function to take new longitude and altitude??