if (document.images) {
 sidenav01_on = new Image();   sidenav01_on.src  = "images/sidenav01on.png"; 
 sidenav01_off = new Image();  sidenav01_off.src = "images/sidenav01.png"; 

 sidenav02_on = new Image();   sidenav02_on.src  = "images/sidenav02on.png"; 
 sidenav02_off = new Image();  sidenav02_off.src = "images/sidenav02.png"; 

 sidenav03_on = new Image();   sidenav03_on.src  = "images/sidenav03on.png"; 
 sidenav03_off = new Image();  sidenav03_off.src = "images/sidenav03.png"; 

 sidenav04_on = new Image();   sidenav04_on.src  = "images/sidenav04on.png"; 
 sidenav04_off = new Image();  sidenav04_off.src = "images/sidenav04.png"; 

 sidenav05_on = new Image();   sidenav05_on.src  = "images/sidenav05on.png"; 
 sidenav05_off = new Image();  sidenav05_off.src = "images/sidenav05.png"; 

 sidenav06_on = new Image();   sidenav06_on.src  = "images/sidenav06on.png"; 
 sidenav06_off = new Image();  sidenav06_off.src = "images/sidenav06.png"; 

 sidenav07_on = new Image();   sidenav07_on.src  = "images/sidenav07on.png"; 
 sidenav07_off = new Image();  sidenav07_off.src = "images/sidenav07.png"; 

 sidenav08_on = new Image();   sidenav08_on.src  = "images/sidenav08on.png"; 
 sidenav08_off = new Image();  sidenav08_off.src = "images/sidenav08.png"; 

 nav01_on =new Image();  nav01_on.src ="images/nav01on.png"; 
 nav01_off=new Image();  nav01_off.src="images/nav01.png"; 

 nav02_on =new Image();  nav02_on.src ="images/nav02on.png"; 
 nav02_off=new Image();  nav02_off.src="images/nav02.png"; 

 nav03_on =new Image();  nav03_on.src ="images/nav03on.png"; 
 nav03_off=new Image();  nav03_off.src="images/nav03.png"; 

 nav04_on =new Image();  nav04_on.src ="images/nav04on.png"; 
 nav04_off=new Image();  nav04_off.src="images/nav04.png"; 

}

function imgOn(i) {
if (document.images) 
	document.getElementById(i).src = eval(i + '_on.src');
}

function imgOff(i) {
 if (document.images) 
	document.getElementById(i).src = eval(i + '_off.src');
}