var nav1on = new Image;
		nav1on.src = "../images/nav1_r1_c1_on.gif";
	var nav1off = new Image;
		nav1off.src = "../images/nav1_r1_c1_off.gif";
	var nav2on = new Image;
		nav2on.src = "../images/nav1_r1_c2_on.gif";
	var nav2off = new Image;
		nav2off.src = "../images/nav1_r1_c2_off.gif";
	var nav3on = new Image;
		nav3on.src = "../images/nav1_r1_c3_on.gif";
	var nav3off = new Image;
		nav3off.src = "../images/nav1_r1_c3_off.gif";
	var nav4on = new Image;
		nav4on.src = "../images/nav1_r1_c4_on.gif";
	var nav4off = new Image;
		nav4off.src = "../images/nav1_r1_c4_off.gif";
	var nav5on = new Image;
		nav5on.src = "../images/nav1_r1_c5_on.gif";
	var nav5off = new Image;
		nav5off.src = "../images/nav1_r1_c5_off.gif";						
	var sigon = new Image;
		sigon.src = "../images/sig_redfrog_on.gif";
	var sigoff = new Image;
		sigoff.src = "../images/sig_redfrog_off.gif";
		
	var nav1selected = new Image;
		nav1selected.src = "../images/nav1_r1_c1_selected.gif";		
	var nav2selected = new Image;
		nav2selected.src = "../images/nav1_r1_c2_selected.gif";		
	var nav3selected = new Image;
		nav3selected.src = "../images/nav1_r1_c3_selected.gif";		
	var nav4selected = new Image;
		nav4selected.src = "../images/nav1_r1_c4_selected.gif";		
	var nav5selected = new Image;
		nav5selected.src = "../images/nav1_r1_c5_selected.gif";