Radom photo picked up in a Facebook Page albums

RandomPhoto.js

<script type="text/javascript">
window.onload = function main()
{
	var script = document.createElement("script");
	script.src = "https://graph.facebook.com/platform/albums?callback=getalbum";
	document.getElementsByTagName("head")[0].appendChild(script);
}

function getalbum(facebook) {
	var randomalbum = Math.floor(Math.random()*(facebook.data.length));
	try {
		var albumid = facebook.data[randomalbum].id;
		if(facebook.data[randomalbum].type!="normal") {
			albumid = facebook.data[0].id;
		}
	} catch (error) {
	}
	var script = document.createElement("script");
	script.src = "https://graph.facebook.com/"+albumid+"/photos?limit=500&callback=getimage";
	document.getElementsByTagName("head")[0].appendChild(script);
}

function getimage(facebook)
{	
	var randomimg = Math.floor(Math.random()*(facebook.data.length));
	try {
		var link = document.createElement("a");
		link.href = facebook.data[randomimg].link;
		var img = document.createElement("img");
		for (var i = 0; i < facebook.data[randomimg].images.length; i++) {
			if(facebook.data[randomimg].images[i].width==320) {
				img.src = facebook.data[randomimg].images[i].source;
			}
		}
		img.alt = "no image";
		img.title = facebook.data[randomimg].name;
		img.width = 235;
		link.appendChild(img);
		document.getElementById("fb_image").appendChild(link);
	} catch (error) {
	}
}
</script>
<p id="fb_image" style="text-align:center;"></p>