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

function changeImagesArray(array) {
	if (preloadFlag == true) {
		var d = document; var img;
		for (var i=0; i<array.length; i+=2) {
			img = null; var n = array[i];
			if (d.images) {img = d.images[n];}
			if (!img && d.getElementById) {img = d.getElementById(n);}
			if (img) {img.src = array[i+1];}
		}
	}
}

function changeImages() {
	changeImagesArray(changeImages.arguments);
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		pre_articles   = newImage('/images/nav_articles_on.jpg');
		pre_career     = newImage('/images/nav_career_on.jpg');
		pre_contact    = newImage('/images/nav_contact_on.jpg');
		pre_ethics     = newImage('/images/nav_ethics_on.jpg');
		pre_home       = newImage('/images/nav_home_on.jpg');
		pre_interim    = newImage('/images/nav_interim_on.jpg');
		pre_recruiting = newImage('/images/nav_recruiting_on.jpg');
		pre_resume     = newImage('/images/nav_resume_on.jpg');
		pre_retained   = newImage('/images/nav_retained_on.jpg');
		pre_specialty  = newImage('/images/nav_specialty_on.jpg');
		pre_team       = newImage('/images/nav_team_on.jpg');
		preloadFlag    = true;
	}
}