var base= "/images/navigation/";
var nrm = new Array();
var omo = new Array();
var ocl = new Array();
var stuff = new Array('home','news','calendar','browse','search','features','education');
var select = -1;
var temp = 0;
if (document.images) {
 for (i=0;i<stuff.length;i++) {
   nrm[i] = new Image;
   nrm[i].src = base + stuff[i] + "_off.gif"
   omo[i] = new Image;
   omo[i].src = base + stuff[i] + "_on.gif";
   ocl[i] = new Image;
   ocl[i].src = base + stuff[i] + "_on.gif";
  }
}
function over(no) {
  if (document.images && select != no) { document.images[stuff[no]].src = omo[no].src; }
}
function out(no) {
  if (document.images && select != no) { document.images[stuff[no]].src = nrm[no].src; }
}
function clic(no) {
  if (document.images) {
    document.images[stuff[no]].src = ocl[no].src;
    temp = select;
    select = no;
    if (temp != -1) {out(temp);}
  }
}