function makenav(str,w,h) {
	this.off=new Image (w,h);
	this.off.src=dir+"images/nav_"+str+".gif";
	this.on=new Image (w,h);
	this.on.src=dir+"images/nav_"+str+"_on.gif";
}

navIMG=new Array(8);
navIMG[0]=new makenav ("puppies",147,60);
navIMG[1]=new makenav ("kittens",147,60);
navIMG[2]=new makenav ("boutique",147,60);
navIMG[3]=new makenav ("grooming",147,60);
navIMG[4]=new makenav ("bakery",147,60);
navIMG[5]=new makenav ("warranty",147,60);
navIMG[6]=new makenav ("special",147,60);
navIMG[7]=new makenav ("vet",147,60);

function toggle(n,on) {
	if (on==1) {
		document.images["nav"+n].src=navIMG[n].on.src;
	} else {
		document.images["nav"+n].src=navIMG[n].off.src;
	}
}