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(9);
navIMG[0]=new makenav ("locations",200,50);
navIMG[1]=new makenav ("organizations",200,50);
navIMG[2]=new makenav ("instruction",200,50);
navIMG[3]=new makenav ("events",200,50);
navIMG[4]=new makenav ("tables",200,50);
navIMG[5]=new makenav ("links",200,50);
navIMG[6]=new makenav ("news",200,50);
navIMG[7]=new makenav ("home",200,50);
navIMG[8]=new makenav ("sitemap",200,50);

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;
	}
}