window.onload = choosePic;

var myPix = new Array("v2/images/general/cover_1.jpg","v2/images/general/cover_2.jpg","v2/images/general/cover_3.jpg");

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