//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: false, //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.y=250;
                       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() //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(){
                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
                }
            }

}