//Chrome Drop Down Menu- Author: Dynamic Drive (http://www.dynamicdrive.com)
//Last updated: Jan 1st, 06'

var cssdropdown=
{
  disappeardelay: 1, //set delay in miliseconds before menu disappears onmouseout
  
  //No need to edit beyond here////////////////////////
  dropmenuobj: null, ie: document.all, firefox: document.getElementById&&!document.all,
  
  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;
  },
  
  showhide:function(obj, e, visible, hidden)
  {
    if (this.ie || this.firefox)
    this.dropmenuobj.style.left=this.dropmenuobj.style.top="-500px"
    if (e.type=="click" && obj.visibility==hidden || e.type=="mouseover")
    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)
      { //move up?
        edgeoffset=this.dropmenuobj.contentmeasure+obj.offsetHeight
        if ((this.dropmenuobj.y-topedge)<this.dropmenuobj.contentmeasure) //up no good either?
        edgeoffset=this.dropmenuobj.y+obj.offsetHeight-topedge
      }
    }
    return edgeoffset
  },
  
  dropit:function(obj, e, dropmenuID)
  {
    if (this.dropmenuobj!=null) //hide previous menu
    this.dropmenuobj.style.visibility="hidden"
    this.clearhidemenu()
    if (this.ie||this.firefox)
    {
      obj.onmouseout=function(){cssdropdown.delayhidemenu()}
      this.dropmenuobj=document.getElementById(dropmenuID)
      this.dropmenuobj.onmouseover=function(){cssdropdown.clearhidemenu()}
      this.dropmenuobj.onmouseout=function(){cssdropdown.dynamichide(e)}
      this.dropmenuobj.onclick=function(){cssdropdown.delayhidemenu()}
      this.showhide(this.dropmenuobj.style, e, "visible", "hidden")
      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"
    }
  },
  
  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'",this.disappeardelay)
  },
  
  clearhidemenu:function()
  {
    if (this.delayhide!="undefined")
    clearTimeout(this.delayhide)
  }
}