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', 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)}
    }
}