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) {
		var homenav = newImage("images/home-on.jpg");
		var forumnav = newImage("images/forums-on.jpg");
		var linkbuildingnav = newImage("images/link-building-on.jpg");
		var cmnav = newImage("images/cm-on.jpg");
		var videonav = newImage("images/video-on.jpg");
		var socialmedianav = newImage("images/sm-packages-on.jpg");
		var careersnav = newImage("images/careers-on.jpg");
		var testimonialsnav = newImage("images/testimonials-on.jpg");
		preloadFlag = true;
	}
}