var size = 4; // Number of alternative images var 
imagesLeft = new Array ("images/header_images/L1.jpg",
				    "images/header_images/L2.jpg",
				    "images/header_images/L3.jpg",
					"images/header_images/L4.jpg");

imagesRight = new Array ("images/header_images/R1.jpg",
				    "images/header_images/R2.jpg",
				    "images/header_images/R3.jpg",
					"images/header_images/R4.jpg");


function pickRandom(range) {
	if (Math.random) return Math.round(Math.random() * (range-1)); 
	
	else { 
		var now = new Date(); return (now.getTime() / 1000) % range; 
		} 
	}
	
var choiceL = pickRandom(size); 
var choiceR = pickRandom(size); 

function buildImageLinks(location) {
	if (location == "left") {
		document.writeln('<img src="'+imagesLeft[choiceL]+'" height="243" width="213" alt="Area Agency on Aging for North Florida" />');		 
	}
	else {
		document.writeln('<img src="'+imagesRight[choiceR]+'" height="243" width="216" alt="Area Agency on Aging for North Florida" />');
	
	};
};