//Drop Down Tabs Menu- Author: Dynamic Drive (http://www.dynamicdrive.com)
//Created: May 16th, 07'

var tabdropdown={
  disappeardelay: 200, //set delay in miliseconds before menu disappears onmouseout
  disablemenuclick: false, //when user clicks on a menu item with a drop down menu, disable menu item's link?
  enableiframeshim: 1, //1 or 0, for true or false

  //No need to edit beyond here////////////////////////
  dropmenuobj: null, ie: document.all, firefox: document.getElementById&&!document.all, previousmenuitem:null,
  currentpageurl: window.location.href.replace("http://"+window.location.hostname, "").replace(/^\//, ""), //get current page url (minus hostname, ie: http://www.dynamicdrive.com/)

  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, obj2){ //obj refers to drop down menu, obj2 refers to tab menu item mouse is currently over
    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 (obj2.parentNode.className.indexOf("default")==-1) //if tab isn't a default selected one
        obj2.parentNode.className="selected"
      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.standardbody.scrollLeft+this.standardbody.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.standardbody.scrollTop : window.pageYOffset
      var windowedge=this.ie && !window.opera? this.standardbody.scrollTop+this.standardbody.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
      }
      this.dropmenuobj.firstlink.style.borderTopWidth=(edgeoffset==0)? 0 : "1px" //Add 1px top border to menu if dropping up
    }
    return edgeoffset
  },

  dropit:function(obj, e, dropmenuID){
    if (this.dropmenuobj!=null){ //hide previous menu
      this.dropmenuobj.style.visibility="hidden" //hide menu
      if (this.previousmenuitem!=null && this.previousmenuitem!=obj){
        if (this.previousmenuitem.parentNode.className.indexOf("default")==-1) //If the tab isn't a default selected one
          this.previousmenuitem.parentNode.className=""
      }
    }
    this.clearhidemenu()
    if (this.ie||this.firefox){
      obj.onmouseout=function(){tabdropdown.delayhidemenu(obj)}
      obj.onclick=function(){return !tabdropdown.disablemenuclick} //disable main menu item link onclick?
      this.dropmenuobj=document.getElementById(dropmenuID)
      this.dropmenuobj.onmouseover=function(){tabdropdown.clearhidemenu()}
      this.dropmenuobj.onmouseout=function(e){tabdropdown.dynamichide(e, obj)}
      this.dropmenuobj.onclick=function(){tabdropdown.delayhidemenu(obj)}
      this.showhide(this.dropmenuobj.style, e, obj)
      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.previousmenuitem=obj //remember main menu item mouse moved out from (and into current menu item)
      this.positionshim() //call iframe shim function
    }
  },

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

  dynamichide:function(e, obj2){ //obj2 refers to tab menu item mouse is currently over
    var evtobj=window.event? window.event : e
    if (this.ie&&!this.dropmenuobj.contains(evtobj.toElement))
      this.delayhidemenu(obj2)
    else if (this.firefox&&e.currentTarget!= evtobj.relatedTarget&& !this.contains_firefox(evtobj.currentTarget, evtobj.relatedTarget))
      this.delayhidemenu(obj2)
  },

  delayhidemenu:function(obj2){
    this.delayhide=setTimeout(function(){tabdropdown.dropmenuobj.style.visibility='hidden'; if (obj2.parentNode.className.indexOf('default')==-1) obj2.parentNode.className=''},this.disappeardelay) //hide menu
  },

  clearhidemenu:function(){
    if (this.delayhide!="undefined")
      clearTimeout(this.delayhide)
  },

  positionshim:function(){ //display iframe shim 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'
  },

isSelected:function(menuurl){
  var menuurl=menuurl.replace("http://"+menuurl.hostname, "").replace(/^\//, "")
  return (tabdropdown.currentpageurl==menuurl)
},

  init:function(menuid, dselected){
    this.standardbody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body //create reference to common "body" across doctypes
    var menuitems=document.getElementById(menuid).getElementsByTagName("a")
    for (var i=0; i<menuitems.length; i++){
      if (menuitems[i].getAttribute("rel")){
        var relvalue=menuitems[i].getAttribute("rel")
        document.getElementById(relvalue).firstlink=document.getElementById(relvalue).getElementsByTagName("a")[0]
        menuitems[i].onmouseover=function(e){
          var event=typeof e!="undefined"? e : window.event
          tabdropdown.dropit(this, event, this.getAttribute("rel"))
        }
      }
      if (dselected=="auto" && typeof setalready=="undefined" && this.isSelected(menuitems[i].href)){
        menuitems[i].parentNode.className+=" selected default"
        var setalready=true
      }
      else if (parseInt(dselected)==i)
        menuitems[i].parentNode.className+=" selected default"
    }
  }
}