if (document.images) {
      emailhosting = new Image;
	  emailhostingover = new Image;
	  exchangehosting = new Image;
	  exchangehostingover = new Image;
	  hybridexchange = new Image;
	  hybridexchangeover = new Image;
	  resellerhosting = new Image;
	  resellerhostingover = new Image;
	  highvolume = new Image;
	  highvolumeover = new Image;
	  
      // set image urls
      
      emailhosting.src = "/images/email-hosting.gif";
      emailhostingover.src = "/images/email-hosting-over.gif";
	  exchangehosting.src = "/images/exchange-hosting.gif";
      exchangehostingover.src = "/images/exchange-hosting-over.gif";
	  hybridexchange.src = "/images/hybrid-exchange.gif";
      hybridexchangeover.src = "/images/hybrid-exchange-over.gif";
	  resellerhosting.src = "/images/reseller-hosting.gif";
      resellerhostingover.src = "/images/reseller-hosting-over.gif";
	  highvolume.src = "/images/high-volume.gif";
      highvolumeover.src = "/images/high-volume-over.gif";

	}
	
function swapImage(thisImage,newImage) {
	if (document.images) {
		document[thisImage].src = eval(newImage + ".src")
	}
}