var count = 0;
var vargenero= '';
var theImages = new Array()
theImages[0] = 'bg_home_1';
theImages[1] = 'bg_home_2';
theImages[2] = 'bg_home_3';

var j = 0
var p = theImages.length;
var preBuffer = new Array()

var whichImage = Math.round(Math.random()*(p-1));
preBuffer[0] = new Image()
preBuffer[0].src = theImages[whichImage];