function imgOn(imgName)
{if (document.images) {document[imgName].src=eval(imgName+"on.src");}}

function imgOff(imgName)
{if (document.images) {document[imgName].src=eval(imgName+"off.src");}}

if (document.images)
{
homeon=new Image(); homeon.src="img/gnav_home_over.gif";
homeoff=new Image(); homeoff.src="img/gnav_home_off.gif";

aboutuson=new Image(); aboutuson.src="img/gnav_aboutus_over.gif";
aboutusoff=new Image(); aboutusoff.src="img/gnav_aboutus_off.gif";

serviceson=new Image(); serviceson.src="img/gnav_services_over.gif";
servicesoff=new Image(); servicesoff.src="img/gnav_services_off.gif";

clientson=new Image(); clientson.src="img/gnav_clients_over.gif";
clientsoff=new Image(); clientsoff.src="img/gnav_clients_off.gif";

casestudieson=new Image(); casestudieson.src="img/gnav_casestudies_over.gif";
casestudiesoff=new Image(); casestudiesoff.src="img/gnav_casestudies_off.gif";

contacton=new Image(); contacton.src="img/gnav_contactus_over.gif";
contactoff=new Image(); contactoff.src="img/gnav_contactus_off.gif";

loginon=new Image(); loginon.src="img/gnav_login_over.gif";
loginoff=new Image(); loginoff.src="img/gnav_login_off.gif";

}