/* Mouse Over
===========================================================*/

(function() {
  if (!document.getElementsByTagName) return;

  var addEvent, switchImage, init;
  addEvent = function(obj, type, func) {
    if (obj.addEventListener) {
      obj.addEventListener(type, func, false);
    }
    else if (obj.attachEvent) {
      obj.attachEvent('on' + type, func);
    }
  };
  switchImage = function(event) {
    var img = event.target || event.srcElement;
    img.src = (img.src == img.srcOff) ? img.srcOn : img.srcOff;
  };
  init = function() {
    var imgs = document.getElementsByTagName('img');
    var loaded = {}, img;
    for (var i = 0, len = imgs.length; i < len; i++) {
      img = imgs[i];
      if ( !img.src.match(/^(.*_)off(\..*)$/) ) continue;
      img.srcOff = img.src;
      img.srcOn = RegExp.$1 + 'on' + RegExp.$2;
      addEvent(img, 'mouseover', switchImage);
      addEvent(img, 'mouseout', switchImage);
      if (loaded[img.srcOn]) continue;
      loaded[img.srcOn] = true;
      (new Image).src = img.srcOn;
    }
  };

  addEvent(window, 'load', init);
})();




/* Pulldownmenu
===========================================================*/

var TimeOut         = 100000;
var currentLayer    = null;
var currentitem     = null;
var currentLayerNum = 0;
var noClose         = 0;
var closeTimer      = null;

function mopen(n) {
  var l  = document.getElementById("menu"+n);
  var mm = document.getElementById("mmenu"+n);
	
  if(l) {
    mcancelclosetime();
    l.style.visibility='visible';
    if(currentLayer && (currentLayerNum != n))
      currentLayer.style.visibility='hidden';
    currentLayer = l;
    currentitem = mm;
    currentLayerNum = n;			
  } else if(currentLayer) {
    currentLayer.style.visibility='hidden';
    currentLayerNum = 0;
    currentitem = null;
    currentLayer = null;
 	}
}

function mclosetime() {
  closeTimer = window.setTimeout(mclose, TimeOut);
}

function mcancelclosetime() {
  if(closeTimer) {
    window.clearTimeout(closeTimer);
    closeTimer = null;
  }
}

function mclose() {
  if(currentLayer && noClose!=1)   {
    currentLayer.style.visibility='hidden';
    currentLayerNum = 0;
    currentLayer = null;
    currentitem = null;
  } else {
    noClose = 0;
  }
  currentLayer = null;
  currentitem = null;
}

document.onclick = mclose;