// set image path vars
var navPath="/img/nav/";
var snavPath=navPath+selecteditem+"/";

// preload primary nav buttons
for(i=0;i<navitems.length;i++) {
  eval("var "+navitems[i]+"_i=new Image();");
  eval("var "+navitems[i]+"_a=new Image();");
  eval(navitems[i]+"_i.src='"+navPath+navitems[i]+"_i.gif';");
  eval(navitems[i]+"_a.src='"+navPath+navitems[i]+"_a.gif';");
}
// preload secondary nav buttons
for(i=0;i<snavitems.length;i++) {
  eval("var snav_"+snavitems[i]+"_i=new Image();");
  eval("var snav_"+snavitems[i]+"_a=new Image();");
  eval("snav_"+snavitems[i]+"_i.src='"+snavPath+snavitems[i]+"_i.gif';");
  eval("snav_"+snavitems[i]+"_a.src='"+snavPath+snavitems[i]+"_a.gif';");
}

// process primary nav rollovers
function swap(n,act) {
  if(document.images && selecteditem!=navitems[n]) {
    eval("document."+navitems[n]+".src="+navitems[n]+"_"+act+".src;");
  }
}
// process secondary nav rollovers
function sswap(n,act) {
  if(document.images && sselecteditem!=snavitems[n]) {
    eval("document.snav_"+snavitems[n]+".src=snav_"+snavitems[n]+"_"+act+".src;");
  }
}