Untitled

function Singleton(){
    this.list = new Array();

    this.getList = function(){

    }

    this.add = function(num){
        this.list.push(num);
    }

    this.print = function(){
        $.each(this.list,function(i,o){
            console.log(o);
        });
    }
}

<script src='jquery-1.11.1.min.js'></script>
<script src='singleton.js'></script>
<script type='text/javascript'>

    var list;

    function insert(){
        var num = $('#number').val();
        list.add(num);
        list.print();
    }

    $(document).ready(function(){
        list = new Singleton();
    });
</script>
<body>
    <input type='text' id='number'/> <input type='button' value='Insert' onclick='insert()'/>
</body>