function swaponhome()
 {
      document.btnhome.src="images/btn-home-over.gif";

 }
function swapoffhome()
 {
      document.btnhome.src="images/btn-home.gif";

 }

function swaponabout()
 {
      document.btnabout.src="images/btn-about-over.gif";

 }
function swapoffabout()
 {
      document.btnabout.src="images/btn-about.gif";

 }

function swaponcontact()
 {
      document.btncontact.src="images/btn-contact-over.gif";

 }
function swapoffcontact()
 {
      document.btncontact.src="images/btn-contact.gif";

 }

function swaponrtmprocess()
 {
      document.btnrtmprocess.src="images/btn-rtmprocess-over.gif";

 }
function swapoffrtmprocess()
 {
      document.btnrtmprocess.src="images/btn-rtmprocess.gif";

 }

function swaponrtmproducts()
 {
      document.btnrtmproducts.src="images/btn-rtmproducts-over.gif";

 }
function swapoffrtmproducts()
 {
      document.btnrtmproducts.src="images/btn-rtmproducts.gif";

 }

function swapontooling()
 {
      document.btntooling.src="images/btn-tooling-over.gif";

 }
function swapofftooling()
 {
      document.btntooling.src="images/btn-tooling.gif";

 }

function swaponequipment()
 {
      document.btnequipment.src="images/btn-equipment-over.gif";

 }
function swapoffequipment()
 {
      document.btnequipment.src="images/btn-equipment.gif";

 }

function swaponlocation()
 {
      document.btnlocation.src="images/btn-location-over.gif";

 }
function swapofflocation()
 {
      document.btnlocation.src="images/btn-location.gif";

 }