var cssdropdown={
  disappeardelay: 250, disablemenuclick: false, enableswipe: 1, enableiframeshim: 1, dropmenuobj: null, ie: document.all, firefox: document.getElementById&&!document.all, swipetimer: undefined, bottomclip:0, getposOffset:function(what, offsettype)
  {
    var totaloffset=(offsettype=="left")? what.offsetLeft : what.offsetTop;
    var parentEl=what.offsetParent;
    while (parentEl!=null)
    {
      totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
      parentEl=parentEl.offsetParent;
    }
    return totaloffset;
  },

  swipeeffect:function()
  {
    if (this.bottomclip<parseInt(this.dropmenuobj.offsetHeight))
	{
      this.bottomclip+=10+(this.bottomclip/10)
      this.dropmenuobj.style.clip="rect(0 auto "+this.bottomclip+"px 0)"
    }
    else
      return
      this.swipetimer=setTimeout("cssdropdown.swipeeffect()", 10)
  },

  showhide:function(obj, e)
  {
    if (this.ie || this.firefox)
    this.dropmenuobj.style.left=this.dropmenuobj.style.top="-500px"
    if (e.type=="click" && obj.visibility==hidden || e.type=="mouseover")
	{
      if (this.enableswipe==1)
	  {
        if (typeof this.swipetimer!="undefined")
        clearTimeout(this.swipetimer)
        obj.clip="rect(0 auto 0 0)"
        this.bottomclip=0
        this.swipeeffect()
      }
      obj.visibility="visible"
    }
    else if (e.type=="click")
    obj.visibility="hidden"
  },

  iecompattest:function()
  {
    return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
  },

  clearbrowseredge:function(obj, whichedge)
  {
    var edgeoffset=0
    if (whichedge=="rightedge")
	{
      var windowedge=this.ie && !window.opera? this.iecompattest().scrollLeft+this.iecompattest().clientWidth-15 : window.pageXOffset+window.innerWidth-15
      this.dropmenuobj.contentmeasure=this.dropmenuobj.offsetWidth
      if (windowedge-this.dropmenuobj.x < this.dropmenuobj.contentmeasure)  //move menu to the left?
      edgeoffset=this.dropmenuobj.contentmeasure-obj.offsetWidth
    }
    else
    {
      var topedge=this.ie && !window.opera? this.iecompattest().scrollTop : window.pageYOffset
      var windowedge=this.ie && !window.opera? this.iecompattest().scrollTop+this.iecompattest().clientHeight-15 : window.pageYOffset+window.innerHeight-18
      this.dropmenuobj.contentmeasure=this.dropmenuobj.offsetHeight
      if (windowedge-this.dropmenuobj.y < this.dropmenuobj.contentmeasure)
	  { 
        edgeoffset=this.dropmenuobj.contentmeasure+obj.offsetHeight
        if ((this.dropmenuobj.y-topedge)<this.dropmenuobj.contentmeasure)
        edgeoffset=this.dropmenuobj.y+obj.offsetHeight-topedge
      }
    }
    return edgeoffset
  },

  dropit:function(obj, e, dropmenuID)
  {
    if (this.dropmenuobj!=null)
    this.dropmenuobj.style.visibility="hidden"
    this.clearhidemenu()
    if (this.ie||this.firefox)
	{
      obj.onmouseout=function(){cssdropdown.delayhidemenu()}
      obj.onclick=function(){return !cssdropdown.disablemenuclick}
      this.dropmenuobj=document.getElementById(dropmenuID)
      this.dropmenuobj.onmouseover=function(){cssdropdown.clearhidemenu()}
      this.dropmenuobj.onmouseout=function(e){cssdropdown.dynamichide(e)}
      this.dropmenuobj.onclick=function(){cssdropdown.delayhidemenu()}
      this.showhide(this.dropmenuobj.style, e)
      this.dropmenuobj.x=this.getposOffset(obj, "left")
      this.dropmenuobj.y=this.getposOffset(obj, "top")
      this.dropmenuobj.style.left=this.dropmenuobj.x-this.clearbrowseredge(obj, "rightedge")+"px"
      this.dropmenuobj.style.top=this.dropmenuobj.y-this.clearbrowseredge(obj, "bottomedge")+obj.offsetHeight+1+"px"
      this.positionshim()
    }
  },

  positionshim:function()
  {
    if (this.enableiframeshim && typeof this.shimobject!="undefined")
    {
      if (this.dropmenuobj.style.visibility=="visible")
	  {
        this.shimobject.style.width=this.dropmenuobj.offsetWidth+"px"
        this.shimobject.style.height=this.dropmenuobj.offsetHeight+"px"
        this.shimobject.style.left=this.dropmenuobj.style.left
        this.shimobject.style.top=this.dropmenuobj.style.top
      }
      this.shimobject.style.display=(this.dropmenuobj.style.visibility=="visible")? "block" : "none"
    }
  },

  hideshim:function()
  {
    if (this.enableiframeshim && typeof this.shimobject!="undefined")
    this.shimobject.style.display='none'
  },

  contains_firefox:function(a, b) 
  {
    while (b.parentNode)
    if ((b = b.parentNode) == a)
    return true;
    return false;
  },

  dynamichide:function(e)
  {
    var evtobj=window.event? window.event : e
    if (this.ie&&!this.dropmenuobj.contains(evtobj.toElement))
    this.delayhidemenu()
    else if (this.firefox&&e.currentTarget!= evtobj.relatedTarget&& !this.contains_firefox(evtobj.currentTarget, evtobj.relatedTarget))
    this.delayhidemenu()
  },

  delayhidemenu:function()
  {
    this.delayhide=setTimeout("cssdropdown.dropmenuobj.style.visibility='hidden'; cssdropdown.hideshim()",this.disappeardelay)
  },
  
  clearhidemenu:function()
  {
    if (this.delayhide!="undefined") 
    clearTimeout(this.delayhide)
  },

  startedu:function()
  {
    for (var ids=0; ids<arguments.length; ids++)
    {
      var menuitems=document.getElementById(arguments[ids]).getElementsByTagName("a")
      for (var i=0; i<menuitems.length; i++)
  	  {
        if (menuitems[i].getAttribute("rel"))
	    {
          var relvalue=menuitems[i].getAttribute("rel")
          menuitems[i].onmouseover=function(e)
	      {
            var event=typeof e!="undefined"? e : window.event
            cssdropdown.dropit(this,event,this.getAttribute("rel"))
          }
        }
      }
    }
  }
}