// Definitioner för de olika bilderna 

a_img=new Image();
a_imgon=new Image();
a_imgstay=new Image();
a_img.src="images/nav1.gif";
a_imgon.src="images/nav1a.gif";
a_imgstay.src="images/nav1s.gif";

b_img=new Image();
b_imgon=new Image();
b_imgstay=new Image();
b_img.src="images/nav2.gif";
b_imgon.src="images/nav2a.gif";
b_imgstay.src="images/nav2s.gif";

c_img=new Image();
c_imgon=new Image();
c_imgstay=new Image();
c_img.src="images/nav3.gif";
c_imgon.src="images/nav3a.gif";
c_imgstay.src="images/nav3s.gif";

d_img=new Image();
d_imgon=new Image();
d_imgstay=new Image();
d_img.src="images/nav4.gif";
d_imgon.src="images/nav4a.gif";
d_imgstay.src="images/nav4s.gif";

e_img=new Image();
e_imgon=new Image();
e_imgstay=new Image();
e_img.src="images/nav5.gif";
e_imgon.src="images/nav5a.gif";
e_imgstay.src="images/nav5s.gif";

f_img=new Image();
f_imgon=new Image();
f_imgstay=new Image();
f_img.src="images/nav6.gif";
f_imgon.src="images/nav6a.gif";
f_imgstay.src="images/nav6s.gif";



// funktioner för att byta mellan de olika bilderna
imageStay=""

function imageon(name){
	if (imageStay !=name){
	  	document[name].src = eval(name + "on.src");
	}
}

function imageoff(name){
	if (imageStay !=name){
       		document[name].src = eval(name + ".src");
	}
}

function on(name){
	imageon(name);
}

function off(name){
	imageoff(name);
}

function selected(name){
	document[name].src=eval(name+"stay.src");
	if (imageStay != name){
		if (imageStay != ""){
			document[imageStay].src = eval(imageStay + ".src");
		}
	}
	imageStay = name
}