Js隨機數--網頁版的體育彩票選號器

<script>
    
    function Quickpick()
    {
            var ball
            for( ball = 0; ball < 5; ball++)
            {
                    this[ball] = parseInt((Math.random() * Math.pow(10,16)) % 49) + 1;
                    for(var list = 0; list < ball; list++)
                    {
                            if(this[list] == this[ball])
                            {       
                                    list = ball;
                                    ball--;
                            }
                    }
            }
            this[ball] = parseInt((Math.random() * Math.pow(10,16)) % 42) + 1;
            return this;
    }
    
    console.log(Quickpick());
    
    
    var idx;
    var powerball = new Array(6);
    powerball = this.Quickpick();
    document.write("<center>");
    document.write("體育彩票選號器");        
    document.write("<hr width=400><font size=+2>");
    for(idx = 0; idx < 5; idx++)
            document.write(powerball[idx] + " - ")
    document.write("</font><font color=#D00000 size=+2>" + powerball[idx] + "</font>");
    document.write("</center>");
</script>