$(document).ready(function(){
	$(".hover").each(function(){
		src = $(this).attr("src");
		hover = src.replace(".png", "_alt.png");
		preloaded_images_html = $("#preloaded_images").html();
		image_code = "<img src=\""+hover+"\" />";
		$("#preloaded_images").html(preloaded_images_html+image_code);
		$("#preloaded_images").hide();
		$(this).attr("original_src", src);
		$(this).attr("hover_src", hover);
		$(this).hover(function(){
			$(this).attr("src", $(this).attr("hover_src"));
		}, function(){
			$(this).attr("src", $(this).attr("original_src"));
		});
	});
});