var loadComplete = false;
var numRo = 5;
var ro_mnu_on = Array(numRo);
var ro_mnu_off = Array(numRo);
var numItemRo = 5;
var ro_itm_on = Array(numItemRo);
var ro_itm_off = Array(numItemRo);
var ro_space = new Image();
var ro_spinner = new Image();
var ro_close = new Image();

function loadImage(cur) {
    if (cur==undefined) cur = -1;
    for (var i=0; i < numRo ; i++) {
       ro_mnu_on[i] = new Image();
       ro_mnu_off[i] = new Image();
       ro_mnu_on[i].src = "images/mnu"+i+"_on.gif";
       ro_mnu_off[i].src = "images/mnu"+i+".gif";
       if (i == cur) {
          ro_mnu_off[i].src = "images/mnu"+i+"_on.gif";
          $("mnu"+i).src = "images/mnu"+i+"_on.gif";
       }
    }

    ro_space.src = "images/spacer.gif";
    ro_spinner.src = "images/spinner.gif";
    ro_close.src = "images/close.gif";

    loadComplete = true;
}
function swapImage(state, num) {
	if (!loadComplete) return;

	if (state == "on") {
		$("mnu"+num).src = ro_mnu_on[num].src;
	} else {
		$("mnu"+num).src = ro_mnu_off[num].src;
	}

}
function loadItemImage() {
  var num;
  for (var i=0; i < numItemRo ; i++) {
     ro_itm_on[i] = new Image();
     ro_itm_off[i] = new Image();
  	num = "0"+(i+1);
     num = num.slice(-2);
     ro_itm_on[i].src = "items/images/btn_"+num+"_on.gif";
     ro_itm_off[i].src = "items/images/btn_"+num+".gif";
  }

  loadComplete = true;
}
function swapItemImage(state, num) {
	if (!loadComplete) return;

	if (state == "on") {
		$("btn"+num).src = ro_itm_on[num-1].src;
	} else {
		$("btn"+num).src = ro_itm_off[num-1].src;
	}

}