[sg123]

That worked perfectly!

Here's the fixed code block in case someone else is looking for the same solution:

Array.prototype.shuffle = function(){
	var s = [];
	while (this.length) s.push(this.splice(Math.random() * this.length, 1)[0]);
	while (s.length) this.push(s.pop());
	return this;
};
function random_imglink(){
	var myimages = []
		myimages[0] = "01.jpg"
		myimages[1] = "02.jpg"
		myimages[2] = "03.jpg"
		myimages[3] = "04.jpg"
                ...
		myimages[30] = "31.jpg"

		myimages.shuffle();

		var rq = myimages[0];
		var rr = myimages[1];
		var rs = myimages[2];
                ...
		var rz = myimages[9];

	document.write('<img src="images/thumbnails/'+rq+'"> &nbsp;<img src="images/thumbnails/'+rr+'"><br><img src="images/thumbnails/'+rs+'"> &nbsp;<img src="images/thumbnails/'+rt+'"><br><img src="images/thumbnails/'+ru+'"> &nbsp;<img src="images/thumbnails/'+rv+'"><br><img src="images/thumbnails/'+rw+'"> &nbsp;<img src="images/thumbnails/'+rx+'"><br><img src="images/thumbnails/'+ry+'"> &nbsp;<img src="images/thumbnails/'+rz+'">')
}
random_imglink()