Objects and Callback

<p style="line-height: 18px; font-size: 18px;  font-family: times;">
Click "<i>Load samples</i>" to view and edit more JS samples.<br>
<br>
Labyrinth generated with JavaScript:<br><br>
<div id="a"></div>
<script>
var users=[];
var user={name:"abishkar",email:"abishkar"};
users=[user];
users.push(user);
window.alert(users[0]);
var c=document.getElementById("a");
j=document.getElementById("a")
j.innerHTML = "New text!";


app = {
    location : 'abc',
    api : 'abc',
    owner :null,
    users:[],
    groups:[],
    roles:[],
    documents:{},
    customer:null
}
position();
function position(){
        getCurrentPosition(function(position){
        window.alert("first callback"+position);
        },function(){
        window.alert("second callback");
           
        });
}
function getCurrentPosition(callback,callback1){
callback();
callback1();
}

function Data(position,map,clickable,title,animation,icon){
this.position=position;
this.map=map;
this.clickable=clickable;
this.title=title;
this.animation=animation;
this.icon=icon;

}

var minidata = new Data({
                position: "userLocation",
                map: "s",
                clickable: false,
                title:"This is your location.",
                animation : "paint",
                icon: 'image'
            });


var minidata1 = new Data(
            "userLocation",
             "s",
            false,
                "This is your location.",
         "paint",
                'image'
            );


</script>
</p>