//** Chrome Drop Down Menu- Author: Dynamic Drive (http://www.dynamicdrive.com)


var cssdropdown={
disappeardelay: 250, //set delay in miliseconds before menu disappears onmouseout
dropdownindicator: '&nbsp', //specify full HTML to add to end of each menu item with a drop down menu
enablereveal: [true, 4], //enable swipe effect? [true/false, steps (Number of animation steps. Integer between 1-20. Smaller=faster)]
enableiframeshim: 1, //enable "iframe shim" in IE5.5 to IE7? (1=yes, 0=no)

//No need to edit beyond here////////////////////////

dropmenuobj: null, asscmenuitem: null, domsupport: document.all || document.getElementById, standardbody: null, iframeshimadded: false, revealtimers: {},

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;
},

css:function(el, targetclass, action){
        var needle=new RegExp("(^|\\s+)"+targetclass+"($|\\s+)", "ig")
        if (action=="check")
                return needle.test(el.className)
        else if (action=="remove")
                el.className=el.className.replace(needle, "")
        else if (action=="add" && !needle.test(el.className))
                el.className+=" "+targetclass
},

showmenu:function(dropmenu, e){
        if (this.enablereveal[0]){
                if (!dropmenu._trueheight || dropmenu._trueheight<10)
                        dropmenu._trueheight=dropmenu.offsetHeight
                clearTimeout(this.revealtimers[dropmenu.id])
                dropmenu.style.height=dropmenu._curheight=0
                dropmenu.style.overflow="hidden"
                dropmenu.style.visibility="visible"
                this.revealtimers[dropmenu.id]=setInterval(function(){cssdropdown.revealmenu(dropmenu)}, 10)
        }
        else{
                dropmenu.style.visibility="visible"
        }
        this.css(this.asscmenuitem, "selected", "add")
},

revealmenu:function(dropmenu, dir){
        var curH=dropmenu._curheight, maxH=dropmenu._trueheight, steps=this.enablereveal[1]
        if (curH<maxH){
                var newH=Math.min(curH, maxH)
                dropmenu.style.height=newH+"px"
                dropmenu._curheight= newH + Math.round((maxH-newH)/steps) + 1
        }
        else{ //if done revealing menu
                dropmenu.style.height="auto"
                dropmenu.style.overflow="hidden"
                clearInterval(this.revealtimers[dropmenu.id])
        }
},

clearbrowseredge:function(obj, whichedge){
        var edgeoffset=0
        if (whichedge=="rightedge"){
                var windowedge=document.all && !window.opera? this.standardbody.scrollLeft+this.standardbody.clientWidth-5 : window.pageXOffset+window.innerWidth-15
                var dropmenuW=this.dropmenuobj.offsetWidth
                if (windowedge-this.dropmenuobj.x < dropmenuW)  //move menu to the left?
                        edgeoffset=dropmenuW-obj.offsetWidth
        }
        else{
                var topedge=document.all && !window.opera? this.standardbody.scrollTop : window.pageYOffset
                var windowedge=document.all && !window.opera? this.standardbody.scrollTop+this.standardbody.clientHeight-5 : window.pageYOffset+window.innerHeight-18
                var dropmenuH=this.dropmenuobj._trueheight
                if (windowedge-this.dropmenuobj.y < dropmenuH){ //move up?
                        edgeoffset=dropmenuH+obj.offsetHeight
                        if ((this.dropmenuobj.y-topedge)<dropmenuH) //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.hidemenu() //hide menu
        this.clearhidemenu()
        this.dropmenuobj=document.getElementById(dropmenuID) //reference drop down menu
        this.asscmenuitem=obj //reference associated menu item
        this.showmenu(this.dropmenuobj, 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.positionshim() //call iframe shim function
},

positionshim:function(){ //display iframe shim function
        if (this.iframeshimadded){
                if (this.dropmenuobj.style.visibility=="visible"){
                        this.shimobject.style.width=this.dropmenuobj.offsetWidth+"px"
                        this.shimobject.style.height=this.dropmenuobj._trueheight+"px"
                        this.shimobject.style.left=parseInt(this.dropmenuobj.style.left)+"px"
                        this.shimobject.style.top=parseInt(this.dropmenuobj.style.top)+"px"
                        this.shimobject.style.display="block"
                }
        }
},

hideshim:function(){
        if (this.iframeshimadded)
                this.shimobject.style.display='none'
},

isContained:function(m, e){
        var e=window.event || e
        var c=e.relatedTarget || ((e.type=="mouseover")? e.fromElement : e.toElement)
        while (c && c!=m)try {c=c.parentNode} catch(e){c=m}
        if (c==m)
                return true
        else
                return false
},

dynamichide:function(m, e){
        if (!this.isContained(m, e)){
                this.delayhidemenu()
        }
},

delayhidemenu:function(){
        this.delayhide=setTimeout("cssdropdown.hidemenu()", this.disappeardelay) //hide menu
},

hidemenu:function(){
        this.css(this.asscmenuitem, "selected", "remove")
        this.dropmenuobj.style.visibility='hidden'
        this.dropmenuobj.style.left=this.dropmenuobj.style.top="-1000px"
        this.hideshim()
},

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

addEvent:function(target, functionref, tasktype){
        if (target.addEventListener)
                target.addEventListener(tasktype, functionref, false);
        else if (target.attachEvent)
                target.attachEvent('on'+tasktype, function(){return functionref.call(target, window.event)});
},

startchrome:function(){
        if (!this.domsupport)
                return
        this.standardbody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body
        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")
                                var asscdropdownmenu=document.getElementById(relvalue)
                                this.addEvent(asscdropdownmenu, function(){cssdropdown.clearhidemenu()}, "mouseover")
                                this.addEvent(asscdropdownmenu, function(e){cssdropdown.dynamichide(this, e)}, "mouseout")
                                this.addEvent(asscdropdownmenu, function(){cssdropdown.delayhidemenu()}, "click")
                                try{
                                        menuitems[i].innerHTML=menuitems[i].innerHTML+" "+this.dropdownindicator
                                }catch(e){}
                                this.addEvent(menuitems[i], function(e){ //show drop down menu when main menu items are mouse over-ed
                                        if (!cssdropdown.isContained(this, e)){
                                                var evtobj=window.event || e
                                                cssdropdown.dropit(this, evtobj, this.getAttribute("rel"))
                                        }
                                }, "mouseover")
                                this.addEvent(menuitems[i], function(e){cssdropdown.dynamichide(this, e)}, "mouseout") //hide drop down menu when main menu items are mouse out
                                this.addEvent(menuitems[i], function(){cssdropdown.delayhidemenu()}, "click") //hide drop down menu when main menu items are clicked on
                        }
                } //end inner for
        } //end outer for
        if (this.enableiframeshim && document.all && !window.XDomainRequest && !this.iframeshimadded){ //enable iframe shim in IE5.5 thru IE7?
                document.write('<IFRAME id="iframeshim" src="about:blank" frameBorder="0" scrolling="no" style="left:0; top:0; position:absolute; display:none;z-index:90; background: transparent;"></IFRAME>')
                this.shimobject=document.getElementById("iframeshim") //reference iframe object
                this.shimobject.style.filter='progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)'
                this.iframeshimadded=true
        }
} //end startchrome

}