function shownext() {
	var image = document.getElementById("spamimage");
	var type = Math.floor(Math.random()*2);
	if (type == 0) {
	var count = Math.floor(Math.random()*318);
	var counter = "spam_" + count;
	if (count < 10) {
		counter = "spam_0" + count;
	}
	image.src = "images/" + counter + ".jpg";
	} else {
		var count = Math.floor(Math.random()*52);
		var counter = "spam_" + count;
	if (count < 10) {
	counter = "spam_0" + count;
	}
	image.src = "images/" + counter + ".gif";
	}
}