window.onload = choosePic;

var myPix = new Array("images/main/monkey.gif","images/main/takeo.gif","images/main/wall.jpg","images/main/stamp4.png","images/main/hood_insert.png");

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