window.onload = choosePic;

var myPix = new Array(
					  "quotes/q_1.png", 
					  "quotes/q_2.png", 
					  "quotes/q_3.png",
					  "quotes/q_4.png");

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