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) {
		worldmap_01_over = newImage("images/worldmap_01-over.gif");
		worldmap_01_worldmap_02_over = newImage("images/worldmap_01-worldmap_02_ove.gif");
		worldmap_02_worldmap_01_over = newImage("images/worldmap_02-worldmap_01_ove.gif");
		worldmap_02_over = newImage("images/worldmap_02-over.gif");
		worldmap_03_worldmap_04_over = newImage("images/worldmap_03-worldmap_04_ove.gif");
		worldmap_03_over = newImage("images/worldmap_03-over.gif");
		worldmap_04_worldmap_08_over = newImage("images/worldmap_04-worldmap_08_ove.gif");
		worldmap_04_over = newImage("images/worldmap_04-over.gif");
		worldmap_06_worldmap_01_over = newImage("images/worldmap_06-worldmap_01_ove.gif");
		worldmap_06_worldmap_02_over = newImage("images/worldmap_06-worldmap_02_ove.gif");
		worldmap_08_over = newImage("images/worldmap_08-over.gif");
		worldmap_08_worldmap_04_over = newImage("images/worldmap_08-worldmap_04_ove.gif");
		worldmap_08_worldmap_03_over = newImage("images/worldmap_08-worldmap_03_ove.gif");
		worldmap_09_worldmap_01_over = newImage("images/worldmap_09-worldmap_01_ove.gif");
		worldmap_09_worldmap_02_over = newImage("images/worldmap_09-worldmap_02_ove.gif");
		worldmap_09_worldmap_10_over = newImage("images/worldmap_09-worldmap_10_ove.gif");
		worldmap_10_worldmap_02_over = newImage("images/worldmap_10-worldmap_02_ove.gif");
		worldmap_10_over = newImage("images/worldmap_10-over.gif");
		worldmap_11_worldmap_08_over = newImage("images/worldmap_11-worldmap_08_ove.gif");
		worldmap_12_worldmap_04_over = newImage("images/worldmap_12-worldmap_04_ove.gif");
		worldmap_13_over = newImage("images/worldmap_13-over.gif");
		preloadFlag = true;
	}
}