function pos(){

        var items = $('.starone');

        items.each(function () {

            var rand = getRandom();

            $(this).addClass("pos-" + rand);

        });

    }

    var arry=[1,2,3,4,5,6,7];

    function getRandom() {

        var i=Math.floor(Math.random()*arry.length);

        var rand=arry[i];

        arry.splice(i,1);

        return rand;

    }

    pos();