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) {
		home_on 	= newImage("images/navigation/home_on.gif");
		cruising_on	= newImage("images/navigation/cruising_on.gif");
		events_on = newImage("images/navigation/events_on.gif");
		floater_on= newImage("images/navigation/floater_on.gif");
		sailing_on	= newImage("images/navigation/sailing_on.gif");
		about_on	= newImage("images/navigation/about_on.gif");
		archives_on = newImage("images/navigation/archives_on.gif");
		gear_on	 = newImage("images/navigation/gear_on.gif");
		partnera_on = newImage("images/navigation/partners_on.gif");
		visitor_on = newImage("images/navigation/vistior_on.gif");
		preloadFlag = true;
	}
}