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

var cssdropdown = {
  disappeardelay: 250, //set delay in miliseconds before menu disappears onmouseout
  disablemenuclick: true, //when user clicks on a menu item with a drop down menu, disable menu item's link?
  enableswipe: 1, //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

//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) {
    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)"; //hide menu via clipping
        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) { //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"; //hide menu
    this.clearhidemenu();
    if (this.ie || this.firefox) {
      obj.onmouseout = function(){cssdropdown.delayhidemenu()}
      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)}
      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.dropmenuobj.style.width = "240px";
      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() {
    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); //hide menu
  },

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

  startchrome:function() {
    //alert("arguments.length = " + arguments.length);
    for (var ids=0; ids<arguments.length; ids++) {
      var menuitems=document.getElementById(arguments[ids]).getElementsByTagName("a");
      //alert("menuitems.length = " + menuitems.length);
      for (var i=0; i<menuitems.length; i++) {
        if (menuitems[i].getAttribute("rel")) {
          var relvalue=menuitems[i].getAttribute("rel");
          //alert("i = " + i + "; relvalue = " + relvalue);
          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
    }
  },
  
  startchrome_rhm:function() {
    for (var ids=0; ids<arguments.length; ids++) {
      var menuitem = document.getElementById(arguments[ids]);
      if (menuitem.getAttribute("rel")) {
        var relvalue = menuitem.getAttribute("rel");
        menuitem.onmouseover = function(e) {
          var event1=typeof e!="undefined"? e : window.event;
          cssdropdown.dropit(this, event1, 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
    }
  }
}