function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		CallaLil2_over = newImage("/images/lesson_images/CallaLil.jpg");
		yellowab_over = newImage("/images/lesson_images/yellowab.jpg");
		tulipabs_over = newImage("/images/lesson_images/TulipAbs.jpg");
		FlatheadStorm_over = newImage("/images/lesson_images/FlatheadStorm_diag.jpg");
		PinkGerb_over = newImage("/images/lesson_images/PinkGerb2.jpg");
		preloadFlag = true;
	}
}

$(document).ready( function() {
	preloadImages();
});