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

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		nav_aboutus_over = newImage("/images/nav_aboutus_over.jpg");
		nav_electricservice_over = newImage("/images/nav_electricservice_over.jpg");
		nav_energyinformation_over = newImage("/images/nav_energyinformation_over.jpg");
		nav_products_over = newImage("/images/nav_products_over.jpg");
		nav_newsweather_over = newImage("/images/nav_newsweather_over.jpg");
		nav_touchstoneenergy_over = newImage("/images/nav_touchstoneenergy_over.jpg");
		nav_community_over = newImage("/images/nav_community_over.jpg");
		preloadFlag = true;
	}
}
  
function switchLink(nav) {
   switch (nav) {
      case 'aboutus':   
				document.nav_aboutus.src='/images/nav_aboutus_over.jpg';
				document.nav_electricservice.src='/images/nav_electricservice.jpg';
				document.nav_energyinformation.src='/images/nav_energyinformation.jpg';
				document.nav_products.src='/images/nav_products.jpg';
				document.nav_newsweather.src='/images/nav_newsweather.jpg';
				document.nav_touchstoneenergy.src='/images/nav_touchstoneenergy.jpg';
				document.nav_community.src='/images/nav_community.jpg';
				break;
	case 'electricservice':   
				document.nav_aboutus.src='/images/nav_aboutus.jpg';
				document.nav_electricservice.src='/images/nav_electricservice_over.jpg';
				document.nav_energyinformation.src='/images/nav_energyinformation.jpg';
				document.nav_products.src='/images/nav_products.jpg';
				document.nav_newsweather.src='/images/nav_newsweather.jpg';
				document.nav_touchstoneenergy.src='/images/nav_touchstoneenergy.jpg';
				document.nav_community.src='/images/nav_community.jpg';
				break;
	case 'energyinformation':   
				document.nav_aboutus.src='/images/nav_aboutus.jpg';
				document.nav_electricservice.src='/images/nav_electricservice.jpg';
				document.nav_energyinformation.src='/images/nav_energyinformation_over.jpg';
				document.nav_products.src='/images/nav_products.jpg';
				document.nav_newsweather.src='/images/nav_newsweather.jpg';
				document.nav_touchstoneenergy.src='/images/nav_touchstoneenergy.jpg';
				document.nav_community.src='/images/nav_community.jpg';
				break;
	case 'products':   
				document.nav_aboutus.src='/images/nav_aboutus.jpg';
				document.nav_electricservice.src='/images/nav_electricservice.jpg';
				document.nav_energyinformation.src='/images/nav_energyinformation.jpg';
				document.nav_products.src='/images/nav_products_over.jpg';
				document.nav_newsweather.src='/images/nav_newsweather.jpg';
				document.nav_touchstoneenergy.src='/images/nav_touchstoneenergy.jpg';
				document.nav_community.src='/images/nav_community.jpg';
				break;
	case 'newsweather':   
				document.nav_aboutus.src='/images/nav_aboutus.jpg';
				document.nav_electricservice.src='/images/nav_electricservice.jpg';
				document.nav_energyinformation.src='/images/nav_energyinformation.jpg';
				document.nav_products.src='/images/nav_products.jpg';
				document.nav_newsweather.src='/images/nav_newsweather_over.jpg';
			    document.nav_touchstoneenergy.src='/images/nav_touchstoneenergy.jpg';
				document.nav_community.src='/images/nav_community.jpg';
				break;
	case 'touchstoneenergy':   
				document.nav_aboutus.src='/images/nav_aboutus.jpg';
				document.nav_electricservice.src='/images/nav_electricservice.jpg';
				document.nav_energyinformation.src='/images/nav_energyinformation.jpg';
				document.nav_products.src='/images/nav_products.jpg';
				document.nav_newsweather.src='/images/nav_newsweather.jpg';
				document.nav_touchstoneenergy.src='/images/nav_touchstoneenergy_over.jpg';
				document.nav_community.src='/images/nav_community.jpg';
				break;
	case 'community':   
				document.nav_aboutus.src='/images/nav_aboutus.jpg';
				document.nav_electricservice.src='/images/nav_electricservice.jpg';
				document.nav_energyinformation.src='/images/nav_energyinformation.jpg';
				document.nav_products.src='/images/nav_products.jpg';
				document.nav_newsweather.src='/images/nav_newsweather.jpg';
				document.nav_touchstoneenergy.src='/images/nav_touchstoneenergy.jpg';
				document.nav_community.src='/images/nav_community_over.jpg';
				break;
   }
}