function preload(strURL) {
	var imgRequested = new Image();
	imgRequested.src = strURL;
	return imgRequested;
}

var objDim = new Object;
objDim['services'] = preload('common/nav_services.jpg');
objDim['location'] = preload('common/nav_location.jpg');
objDim['community'] = preload('common/nav_community.jpg');
objDim['participate'] = preload('common/nav_participate.jpg');
objDim['contact'] = preload('common/nav_contact.jpg');

var objLit = new Object;
objLit['services'] = preload('common/nav_services_lit.jpg');
objLit['location'] = preload('common/nav_location_lit.jpg');
objLit['community'] = preload('common/nav_community_lit.jpg');
objLit['participate'] = preload('common/nav_participate_lit.jpg');
objLit['contact'] = preload('common/nav_contact_lit.jpg');

function lightNav(strLinkName) {
	document.getElementById('nav_' + strLinkName).src = objLit[strLinkName].src;
}
function dimNav(strLinkName) {
	document.getElementById('nav_' + strLinkName).src = objDim[strLinkName].src;
}