function checkBrowser(){
    this.ver=navigator.appVersion
    this.dom=document.getElementById?1:0
    this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0;
    this.ie4=(document.all && !this.dom)?1:0;
    this.ns5=(this.dom && parseInt(this.ver) >= 5) ?1:0;
    this.ns4=(document.layers && !this.dom)?1:0;
    this.bw=(this.ie5 || this.ie4 || this.ns4 || this.ns5)
    return this
  }
  bw=new checkBrowser()

  var sOpenMenuID = ""
  var sOpenImgID  = ""
  var iBlockClose = 0
  var iTimerID 

  function findPosY(obj)
  {
    var curtop = 0;
    if (document.getElementById || document.all)
    {
      while (obj.offsetParent)
      {
        curtop += obj.offsetTop
        obj = obj.offsetParent;
      }
    }
    else if (document.layers)
      curtop += obj.y;
    return curtop;
  }

  function doMenu(nMenuNum) {
    odMenu(2-nMenuNum+1);
    sOpenMenuID = "idMenu"  + nMenuNum
    sOpenImgID  = "imgMenu" + nMenuNum
    var eMenu = bw.dom? document.getElementById(sOpenMenuID):bw.ie4?document.all[sOpenMenuID]:bw.ns4?eval("document.layers." +sOpenMenuID):0;
    var eImg  = bw.dom? document.getElementById(sOpenImgID):bw.ie4?document.all[sOpenImgID]:bw.ns4?eval("document.layers." +sOpenImgID):0;
    eMenu.style.position = "absolute"
    eMenu.style.left     = eImg.style.left
    eMenu.style.top      = (findPosY(eImg)+20) + "px"
    eMenu.style.display  = ""
    iBlockClose          = 1
  }

  function timedHideMenu() {
    iBlockClose = 0
    iTimerID    = window.setTimeout("hideMenus()",10)
  }
  function hideMenus() {
    odMenu(1);
    odMenu(2);
  }
  function odMenu(nMenuNum) {
    sOpenMenuID = "idMenu"  + nMenuNum
    sOpenImgID  = "imgMenu" + nMenuNum
    var eMenu = bw.dom? document.getElementById(sOpenMenuID):bw.ie4?document.all[sOpenMenuID]:bw.ns4?eval("document.layers." +sOpenMenuID):0;
    if (iBlockClose < 1)
      eMenu.style.display="none"
  }