function changeBGImage(){
var backImage = new Array(); // don't change this
backImage[0] = "images/bg-tamarindo1.jpg";
backImage[1] = "images/bg-tamarindo2.jpg";
backImage[2] = "images/bg-tamarindo3.jpg";
backImage[3] = "images/bg-tamarindo4.jpg";
backImage[4] = "images/bg-tamarindo5.jpg";
backImage[5] = "images/bg-tamarindo6.jpg";
backImage[6] = "images/bg-tamarindo7.jpg";
backImage[7] = "images/bg-tamarindo8.jpg";
backImage[8] = "images/bg-tamarindo9.jpg";
backImage[9] = "images/bg-tamarindo10.jpg";
backImage[10] = "images/bg-tamarindo11.jpg";
backImage[11] = "images/bg-tamarindo12.jpg";
backImage[12] = "images/bg-tamarindo13.jpg";
backImage[13] = "images/bg-tamarindo14.jpg";
if (document.body){
var randomnumber=Math.floor(Math.random()*14)
document.body.style.background = 'url(' + backImage[randomnumber] + ') top center no-repeat #090001';
}
}