function swapon1()
 {
      document.img1.src='Img/navigr1.gif';
 }
function swapoff1()
 {
      document.img1.src='Img/navig1.gif';
 }

function swapon2()
 {
      document.img2.src='Img/navigr2.gif';
 }
function swapoff2()
 {
      document.img2.src='Img/navig2.gif';
 }

function swapon3()
 {
      document.img3.src='Img/navigr3.gif';
 }
function swapoff3()
 {
      document.img3.src='Img/navig3.gif';
 }

function swapon4()
 {
      document.img4.src='Img/navigr4.gif';
 }
function swapoff4()
 {
      document.img4.src='Img/navig4.gif';
 }

function swapon5()
 {
      document.img5.src='Img/navigr5.gif';
 }
function swapoff5()
 {
      document.img5.src='Img/navig5.gif';
 }

function PopWindow(NewURL, Width, Height, Center)
{
var WinTop
var WinLeft
var WinHeight
var WinWidth

	if (Center = true)
	{
           WinHeight = Height * 1.065
           WinWidth = Width * 1.065
 	   WinTop = (screen.height - WinHeight) / 2;
	   WinLeft = (screen.width - WinWidth) / 2;
	   var NewWin = window.open(NewURL, 'Popup', config='toolbar=no,menubar=no,status=no,location=no,directories=no,scrollbars=yes,width=' + WinWidth + ',height=' + WinHeight + ',top=' + WinTop + ',left=' + WinLeft );
	}
	else
	{
	   var NewWin = window.open(NewURL, 'Popup', config='toolbar=no,menubar=no,status=no,location=no,directories=no,scrollbars=yes,width=' + Width + ',height=' + Height );
	}
}