function swapon1()
 {
      document.btn1.src="images/btnover-home.gif";

 }
function swapoff1()
 {
      document.btn1.src="images/btn-home.gif";

 }

function swapon2()
 {
      document.btn2.src="images/btnover-medicalreports.gif";

 }
function swapoff2()
 {
      document.btn2.src="images/btn-medicalreports.gif";

 }

function swapon3()
 {
      document.btn3.src="images/btnover-resourcelists.gif";

 }
function swapoff3()
 {
      document.btn3.src="images/btn-resourcelists.gif";

 }

function swapon4()
 {
      document.btn4.src="images/btnover-about.gif";

 }
function swapoff4()
 {
      document.btn4.src="images/btn-about.gif";

 }

function swapon5()
 {
      document.btn5.src="images/btnover-contact.gif";

 }
function swapoff5()
 {
      document.btn5.src="images/btn-contact.gif";

 }

function swapon6()
 {
      document.btn6.src="images/btnover-reportcontents.gif";

 }
function swapoff6()
 {
      document.btn6.src="images/btn-reportcontents.gif";

 }

function swapon7()
 {
      document.btn7.src="images/btnover-order.gif";

 }
function swapoff7()
 {
      document.btn7.src="images/btn-order.gif";

 }

function swapon8()
 {
      document.btn8.src="images/btnover-glossary.gif";

 }
function swapoff8()
 {
      document.btn8.src="images/btn-glossary.gif";

 }