//1) Added ability to reveal drop down content via "click" of anchor link (instead of default "mouseover")

                                //2) Added ability to disable drop down content from auto hiding when mouse rolls out of it

                                //3) Added hidediv(id) public function to directly hide drop down div dynamically

 

 

var dropdowncontent={

        disableanchorlink: true, //when user clicks on anchor link, should link itself be disabled (always true if "revealbehavior" above set to "click")

 hidedivmouseout: [true, 200], //Set hiding behavior within Drop Down DIV itself: [hide_div_onmouseover?, miliseconds_before_hiding]

        ajaxloadingmsg: "Loading content. Please wait...", //HTML to show while ajax page is being feched, if applicable

        ajaxbustcache: true, //Bust cache when fetching Ajax pages?

 

        getposOffset:function(what, offsettype){

                return (what.offsetParent)? what[offsettype]+this.getposOffset(what.offsetParent, offsettype) : what[offsettype]

        },

 

        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

        },

 

        show:function(anchorobj, subobj, e){

                if (!this.isContained(anchorobj, e) || (e && e.type=="click")){

                        var e=window.event || e

                        if (e.type=="click" && subobj.style.visibility=="visible"){

                                subobj.style.visibility="hidden"

                                return

                        }

                        var horizontaloffset=(subobj.dropposition[0]=="left")? -(subobj.offsetWidth-anchorobj.offsetWidth) : 0 //calculate user added horizontal offset

                        var verticaloffset=(subobj.dropposition[1]=="top")? -subobj.offsetHeight : anchorobj.offsetHeight //calculate user added vertical offset

                        subobj.style.left=this.getposOffset(anchorobj, "offsetLeft") + horizontaloffset + "px"

                        subobj.style.top=this.getposOffset(anchorobj, "offsetTop")+verticaloffset+"px"

                        subobj.style.clip=(subobj.dropposition[1]=="top")? "rect(auto auto auto 0)" : "rect(0 auto 0 0)" //hide drop down box initially via clipping

                        subobj.style.visibility="visible"

                        subobj.startTime=new Date().getTime()

                        subobj.contentheight=parseInt(subobj.offsetHeight)

                        if (typeof window["hidetimer_"+subobj.id]!="undefined") //clear timer that hides drop down box?

                                clearTimeout(window["hidetimer_"+subobj.id])

                        this.slideengine(subobj, (subobj.dropposition[1]=="top")? "up" : "down")

                }

        },

 

        curveincrement:function(percent){

                return (1-Math.cos(percent*Math.PI)) / 2 //return cos curve based value from a percentage input

        },

 

        slideengine:function(obj, direction){

                var elapsed=new Date().getTime()-obj.startTime //get time animation has run

                if (elapsed<obj.glidetime){ //if time run is less than specified length

                        var distancepercent=(direction=="down")? this.curveincrement(elapsed/obj.glidetime) : 1-this.curveincrement(elapsed/obj.glidetime)

                        var currentclip=(distancepercent*obj.contentheight)+"px"

                        obj.style.clip=(direction=="down")? "rect(0 auto "+currentclip+" 0)" : "rect("+currentclip+" auto auto 0)"

                        window["glidetimer_"+obj.id]=setTimeout(function(){dropdowncontent.slideengine(obj, direction)}, 10)

                }

                else{ //if animation finished

                        obj.style.clip="rect(0 auto auto 0)"

                }

        },

 

        hide:function(activeobj, subobj, e){

                if (!dropdowncontent.isContained(activeobj, e)){

                        window["hidetimer_"+subobj.id]=setTimeout(function(){

                                subobj.style.visibility="hidden"

                                subobj.style.left=subobj.style.top=0

                                clearTimeout(window["glidetimer_"+subobj.id])

                        }, dropdowncontent.hidedivmouseout[1])

                }

        },

 

        hidediv:function(subobjid){

                document.getElementById(subobjid).style.visibility="hidden"

        },

 

        ajaxconnect:function(pageurl, divId){

                var page_request = false

                var bustcacheparameter=""

                if (window.XMLHttpRequest) // if Mozilla, IE7, Safari etc

                        page_request = new XMLHttpRequest()

                else if (window.ActiveXObject){ // if IE6 or below

                        try {

                        page_request = new ActiveXObject("Msxml2.XMLHTTP")

                        }

                        catch (e){

                                try{

                                page_request = new ActiveXObject("Microsoft.XMLHTTP")

                                }

                                catch (e){}

                        }

                }

                else

                        return false

                document.getElementById(divId).innerHTML=this.ajaxloadingmsg //Display "fetching page message"

                page_request.onreadystatechange=function(){dropdowncontent.loadpage(page_request, divId)}

                if (this.ajaxbustcache) //if bust caching of external page

                        bustcacheparameter=(pageurl.indexOf("?")!=-1)? "&"+new Date().getTime() : "?"+new Date().getTime()

                page_request.open('GET.html', pageurl+bustcacheparameter, true)

                page_request.send(null)

        },

 

        loadpage:function(page_request, divId){

                if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1)){

                        document.getElementById(divId).innerHTML=page_request.responseText

                }

        },

 

 init:function(anchorid, pos, glidetime, revealbehavior){

                var anchorobj=document.getElementById(anchorid)

                var subobj=document.getElementById(anchorobj.getAttribute("rel"))

                var subobjsource=anchorobj.getAttribute("rev")

                if (subobjsource!=null && subobjsource!="")

                        this.ajaxconnect(subobjsource, anchorobj.getAttribute("rel"))

                subobj.dropposition=pos.split("-")

                subobj.glidetime=glidetime || 1000

                subobj.style.left=subobj.style.top=0

                if (typeof revealbehavior=="undefined" || revealbehavior=="mouseover"){

                        anchorobj.onmouseover=function(e){dropdowncontent.show(this, subobj, e)}

                        anchorobj.onmouseout=function(e){dropdowncontent.hide(subobj, subobj, e)}

                        if (this.disableanchorlink) anchorobj.onclick=function(){return false}

                }

                else

                        anchorobj.onclick=function(e){dropdowncontent.show(this, subobj, e); return false}

                if (this.hidedivmouseout[0]==true) //hide drop down DIV when mouse rolls out of it?

                        subobj.onmouseout=function(e){dropdowncontent.hide(this, subobj, e)}

        }