//Chrome Drop Down Menu v2.01- Author: Dynamic Drive (http://www.dynamicdrive.com)
//Last updated: November 14th 06- added iframe shim technique

/***********************************************
* Chrome CSS Drop Down Menu- ΠDynamic Drive DHTML code library (www.dynamicdrive.com)
* This notice MUST stay intact for legal use
* Visit Dynamic Drive at http://www.dynamicdrive.com/ for full source code
***********************************************/
//Chrome Drop Down Menu- Author: Dynamic Drive (http://www.dynamicdrive.com)
//Last updated: June 14th, 06'

function getElementsByClassName(classname, node) {
  if(!node) node = document.getElementsByTagName("body")[0];
  var a = [];
  var re = new RegExp('\\b' + classname + '\\b');
  var els = node.getElementsByTagName("*");
  for(var i=0,j=els.length; i<j; i++)
  {
    if(re.test(els[i].className))a.push(els[i]);
  }
  return a;
}

var cssdropdown = {
  disappeardelay: 286, //set delay in miliseconds before menu disappears onmouseout
  appeardelay: 432, //set delay in miliseconds before menu appears onmouseover
  disablemenuclick: false, //when user clicks on a menu item with a drop down menu, disable menu item's link?
  enableswipe: 0, //enable swipe effect? 1 for yes, 0 for no
  enableiframeshim: 1, //enable "iframe shim" technique to get drop down menus to correctly appear on top of controls such as form objects in IE5.5/IE6? 1 for yes, 0 for no

  p_menu: '',

  //No need to edit beyond here////////////////////////
  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) //unclip drop down menu visibility gradually
      this.dropmenuobj.style.clip="rect(0 auto "+this.bottomclip+"px 0)"
    }
    else
      return
    this.swipetimer=setTimeout("cssdropdown.swipeeffect()", 10)
  },

  showhide:function(obj, e, dropmenuID)
  {
    if (this.ie || this.firefox)
    {
      //if (e.type=="click" && obj.visibility==hidden || e.type=="mouseover")
      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)" //hide menu via clipping
          this.bottomclip=0
          setTimeout("cssdropdown.swipeeffect()",this.appeardelay)
          //this.swipeeffect()
        }
        this.delayshowmenu()

        //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){

    var p_menu = 	dropmenuID

    if (this.dropmenuobj!=null) //hide previous menu
      this.dropmenuobj.style.visibility="hidden" //hide menu
    this.clearhidemenu()
    if (this.ie||this.firefox){
      obj.onmouseout=function(){
        cssdropdown.delayhidemenu(dropmenuID);
        cssdropdown.clearshowmenu()
      }
      obj.onclick=function(){
        return !cssdropdown.disablemenuclick
      } //disable main menu item link onclick?

      this.dropmenuobj=document.getElementById(dropmenuID)
      this.dropmenuobj.onmouseover=function(){
        cssdropdown.clearhidemenu()
      }
      this.dropmenuobj.onmouseout =function(e){
        cssdropdown.dynamichide(e,dropmenuID)
      }
      this.dropmenuobj.onclick    =function(){
        cssdropdown.delayhidemenu(dropmenuID)
      }
      this.showhide(this.dropmenuobj.style, e, dropmenuID)
      this.dropmenuobj.x=this.getposOffset(obj, "left")
      
      if(document.getElementById("dropmenu1_gl").getAttribute("class")!='selected') {
        document.getElementById("dropmenu1_gl").className = "ua"
      }
      if(document.getElementById("dropmenu2_gl").getAttribute("class")!='selected') {
        document.getElementById("dropmenu2_gl").className = "ua"
      }
      if(document.getElementById("dropmenu3_gl").getAttribute("class")!='selected') {
        document.getElementById("dropmenu3_gl").className = "ua"
      }
      if(document.getElementById("dropmenu4_gl").getAttribute("class")!='selected') {
        document.getElementById("dropmenu4_gl").className = "ua"
      }
      if(document.getElementById("dropmenu5_gl").getAttribute("class")!='selected') {
        document.getElementById("dropmenu5_gl").className = "ua"
      }

      document.getElementById(dropmenuID+"_gl").className = "ua_select"
      this.dropmenuobj.style.left = this.dropmenuobj.x-this.clearbrowseredge(obj, "rightedge")+"px"
      this.dropmenuobj.style.top = (this.dropmenuobj.y ? this.dropmenuobj.y : 0) - this.clearbrowseredge(obj, "bottomedge")+obj.offsetHeight+1+"px"
      this.positionshim() //call iframe shim function
    }
  },

  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(dropmenuID){

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

    if(document.getElementById("dropmenu1_gl").getAttribute("class")!='selected') {
      document.getElementById("dropmenu1_gl").className = "ua"
    }
    if(document.getElementById("dropmenu2_gl").getAttribute("class")!='selected') {
      document.getElementById("dropmenu2_gl").className = "ua"
    }
    if(document.getElementById("dropmenu3_gl").getAttribute("class")!='selected') {
      document.getElementById("dropmenu3_gl").className = "ua"
    }
    if(document.getElementById("dropmenu4_gl").getAttribute("class")!='selected') {
      document.getElementById("dropmenu4_gl").className = "ua"
    }
    if(document.getElementById("dropmenu5_gl").getAttribute("class")!='selected') {
      document.getElementById("dropmenu5_gl").className = "ua"
    }
  },

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

  dynamichide:function(e,dropmenuID){
    //alert(dropmenuID)
    var evtobj=window.event? window.event : e

    if (this.ie&&!this.dropmenuobj.contains(evtobj.toElement))
      this.delayhidemenu(dropmenuID)

    else if (this.firefox&&e.currentTarget!= evtobj.relatedTarget&& !this.contains_firefox(evtobj.currentTarget, evtobj.relatedTarget))
      this.delayhidemenu(dropmenuID)

  },

  delayhidemenu:function(dropmenuID){
    //alert(dropmenuID)
    //	setTimeout("cssdropdown.document.getElementById('dropmenu1_gl').className = 'ua'")
    this.delayhide=setTimeout("cssdropdown.dropmenuobj.style.visibility='hidden'; cssdropdown.hideshim("+dropmenuID+")",this.disappeardelay)
  //hide menu

  },
  
  delayshowmenu:function(){
    this.delayshow=setTimeout("cssdropdown.dropmenuobj.style.visibility='visible'",this.appeardelay)
  },

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

  startchrome: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"))
          }
        }
      }
    }
    if (window.createPopup && !window.XmlHttpRequest){ //if IE5.5 to IE6, create iframe for iframe shim technique
      document.write('<IFRAME id="iframeshim"  src="" style="display: none; left: 0; top: 0; z-index: 90; position: absolute; filter: progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)" frameBorder="0" scrolling="no"></IFRAME>')
      this.shimobject=document.getElementById("iframeshim") //reference iframe object
    }
  }

}