a1=new Image(45,45)
	a1.src="images/nav-off_01.jpg"
	a2=new Image(45,45)
	a2.src="images/nav-on_01.jpg"

	b1=new Image(45,45)
	b1.src="images/nav-off_02.jpg"
	b2=new Image(45,45)
	b2.src="images/nav-on_02.jpg"
	
	c1=new Image(45,45)
	c1.src="images/nav-off_03.jpg"
	c2=new Image(45,45)
	c2.src="images/nav-on_03.jpg"
	
	d1=new Image(45,45)
	d1.src="images/nav-off_04.jpg"
	d2=new Image(45,45)
	d2.src="images/nav-on_04.jpg"
	
	e1=new Image(45,45)
	e1.src="images/nav-off_05.jpg"
	e2=new Image(45,45)
	e2.src="images/nav-on_05.jpg"
	
	f1=new Image(45,45)
	f1.src="images/nav-off_06.jpg"
	f2=new Image(45,45)
	f2.src="images/nav-on_06.jpg"
	
	
	function filter(imagename,objectsrc){
	if (document.images)
	document.images[imagename].src=eval(objectsrc+".src")
	}