function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}
function changeImagesArray(array) {
	if (preloadFlag == true) {
		var d = document; var img;
		for (var i=0; i<array.length; i+=2) {
			img = null; var n = array[i];
			if (d.images) {img = d.images[n];}
			if (!img && d.getElementById) {img = d.getElementById(n);}
			if (img) {img.src = array[i+1];}
		}
	}
}
function changeImages() {
	changeImagesArray(changeImages.arguments);
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		guide_03_over = newImage('images/guide_03-over.gif');
		guide_03_down = newImage('images/guide_03-down.gif');
		guide_05_over = newImage('images/guide_05-over.gif');
		guide_05_down = newImage('images/guide_05-down.gif');
		guide_07_over = newImage('images/guide_07-over.gif');
		guide_07_down = newImage('images/guide_07-down.gif');
		guide_09_over = newImage('images/guide_09-over.gif');
		guide_09_down = newImage('images/guide_09-down.gif');
		guide_11_over = newImage('images/guide_11-over.gif');
		guide_11_down = newImage('images/guide_11-down.gif');
		guide_13_over = newImage('images/guide_13-over.gif');
		guide_13_down = newImage('images/guide_13-down.gif');
		guide_15_over = newImage('images/guide_15-over.gif');
		guide_15_down = newImage('images/guide_15-down.gif');
		preloadFlag = true;
	}
}