// menu ------------------------------------------------------------------------
var currentObj;

function swapMenuImage(obj, state) {

  var regexp = /\.gif$/gi;
  var regexp2 = /_o\.gif$/gi;

  if (state != "") {
    if (state == 2) {
      var loc = obj.src;
      var newloc = loc.replace(regexp, "_o.gif");
      obj.src = newloc;
    }
    else if (state == 1) {
      var loc = obj.src;
      var newloc = loc.replace(regexp2, ".gif");
      obj.src = newloc;
    }
    if (currentObj != null) {
      var loc = currentObj.src;
      var newloc = loc.replace(regexp2, ".gif");
      currentObj.src = newloc;
    }
  }
}