function PointManeger(){

    PointManeger.prototype={

        construct:PointManeger,

        pokazi: function(event){

            event.preventDefault();
            var form=event.target.form;
            var polje=document.getElementById("vektor").value;
            document.getElementById("vneseni").innerHTML="Vneseni vektor je"+polje;

        }
    }

}

var pojnt = new PointManeger();

document.getElementById("pritisk").addEventListener("click", function(event) {
    pojnt.pokazi(event);
},false);