window.onload = choosePic;

var myPix = new Array("../images/index_image_super_spray1.jpg","../images/index_image_super_spray2.jpg","../images/index_image_super_spray3.jpg");

function choosePic() {
	randomNum = Math.floor((Math.random() * myPix.length));
	document.getElementById("index_image").src = myPix[randomNum];
}