// JavaScript Document for 9star by emetreis

function get_random() { var ranNum = Math.floor(Math.random()*3); return ranNum; } 
//sorteia um bg 
function RandBg() {

    var bgs = get_random();
    
    var bg = new Array(3)
     bg[0]= 2;
     bg[1]= 3;
     bg[2]= 4;   
   
    return ("ambiente" + bg[bgs]);
}